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Loudhailer Low Voltage Buzzer BB LED Annunciator for 2  -  4S RC Helicopter Quadcopter Car Battery
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Loudhailer Low Voltage Buzzer BB LED Annunciator for 2 - 4S RC Helicopter Quadcopter Car Battery

- Red

    COD This product supports COD on delivery. Suggestions: Do not place orders with non-COD products, otherwise you will not be able to choose COD payment method.
    Ship between: Dec 08 - Dec 10, Estimated Shipping Time: business days Order Processing Time may require a few days. Once dispatched from warehouse, Shipping (or Delivery) Time depends on the Shipping Method.
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  • interest-free You can enjoy a maximum of 0 interest-free installments, and may not enjoy this offer when placing orders with other products
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Main Function:
1. When testing voltage > 3.6V, 2S Li-Polymer battery 2 green LED keeping light
2. When testing voltage > 3.6V, 3S Li-Polymer battery 3 green LED keeping light
3. When testing voltage > 3.6V, 4S Li-Polymer battery 4 green LED keeping light
4. When voltage < 3.3V, it will buzzer with red LED light

Can test 2 - 4S Li-Polymer battery.
Small and portable, low voltage alarm, with a very loud buzzer - BB.



Type: Servo,Batteries
Feature: Tools/accessories of radio control series toy

Dimension and Weight

Product weight: 0.004 kg
Package weight: 0.024 kg
Product size (L x W x H): 4.0 x 2.0 x 1.0 cm / 1.6 x 0.8 x 0.4 inches
Package size (L x W x H): 2 x 5 x 2 cm

Package Contents

Package Contents: 1 x Loudhailer Low Voltage Buzzer

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Customer Reviews

4.82 out of 5
  • 23
  • 5
  • 0
  • 0
  • 0
See all 28 reviews Write a Review
  • Loh
    Yes (1) Color: Red
    Even thought I gave 5 star rating, the product description states that it takes 2-4s batteries however, the alarm can take only 2-3s batteries and not 4s batteries. The description should be changed. I ordered the product based on the description but failed to see that the photo is different. Usually items are ordered based on the description and not the photos. I will now have to try and sell these off to others.
    The buzzer is loud enough

    Jun 26,2016

  • Вадим
    Yes (0) Color: Red
    Low Voltage Buzzer BB LED Annunciator for 2-4S from
    Устройство очень легкое. Специально взвесил, 4 грамма. Размерами тоже порадовало. Миниатюрное. Подойдет тем, у кого ограничение по весу и размеру. К тому же пищалка очень громкая.

    Dec 20,2016

  • Tuomas
    Yes (1) Color: Red
    LOUD Low Voltage Buzzer
    Really loud alarm. Sounds like a smoke detector. Giving enough time to land safely, and if the helicopter disappears from the field. You can find the basis of its sound. Now I'll allways find my Wltoys v912.
    This would be lighter without LED lights

    Mar 24,2016

  • Chabroux David
    Yes (0) Color: Red
    Buzzer led
    excellente fail safe pour les batteries lipo. retentit une alarme sonore si la tension est trop faible. très petite taille est excellent pour les quads. n'a pas une lecture numérique de la tension mais fonctionne même avec des lumières LED. vert allumé puis rouge progressive led jusqu'à ce que les sons d'alarme
    pas de probleme

    Nov 01,2016

  • Jimmy
    Yes (0) Color: Red
    Low voltage buzzer
    Works great as an alarm for low voltage on my rc boats so I can pull them back out of the water before battery runs critical and they get stranded

    Oct 31,2016

Customer Questions

  • All(1)
  • Product Information(1)
  • Stock Status
  • Payment
  • About Shipping
  • Others

Can I use it to test a LIPO Battery with 7,4 Volt and 20/25 Cells? If yes, since I use the battery to play with an Airsoft Electric Gun, can I hold this product attached to the battery when I'm using it (playing softair), so I'll be advised when the battery is too low to continue using it ?

By sauer1911 Sep-09/2015 15:12:10

Hi sauer1911,  It is suitable for all 2 - 4S Li-Polymer battery. Hope you enjoy shopping here with us.

1 Questions & Answers View All

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There are two key factors which will affect the time you receive your items.

Item processing time
After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.
Shipping methods
China Warehouse:
Shipping Type Country or Region Arrive within 1-7 Days Arrive within 8-15 Days Arrive within 16-30 Days Arrive within 31-45 Days Average Time (Days)
Unregistered Air Mail or Registered Air Mail United States 0.52% 44.87% 49.88% 3.5% 18.13
Spain, United Kingdom, Italy, Germany, France & Portugal 5.18% 43.44% 48.34% 1.17% 15
Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic 2.96% 40.34% 52.54% 3.74% 18.66
Russia 0% 4.45% 84.41% 11.1% 28
Japan, Korea 0% 21.30% 68.80% 9.66% 17.75
Brazil 0% 0% 23.91% 72.09% 38.6
Turkey 0% 37.75% 59.05% 3.1% 20.33
Thailand, Singapore & Malaysia 0% 40.39% 56.12% 2.6% 16.2
Other countries 0.7% 38.79% 47.94% 8.56% 23.57
Priority Line United States 12.28% 79.05% 7.4% 0.52% 11.75
Spain, United Kingdom, Italy, Germany, France & Portugal 8.44% 66.56% 23.45% 0.45% 13.55
Russia 0% 3.48% 75.79% 20.04% 31
Brazil 2.21% 6% 61.29% 25.46% 30
Turkey 20.42% 77% 3% 0.08% 10
Australia 7.67% 86.60% 5.68% 0% 11
Korea 97.54% 1.57% 0.89% 0% 7
Japan 95.80% 2.09% 0% 0% 6.84
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8.45
Other countries 22.33% 30.8% 27.62% 17.64% 18.65
Expedited Shipping ALL countries(EMS) 3.8% 46.8% 26% 15% 14.8
ALL countries(DHL) 65.8% 25.75% 3.86% 0.37% 6.72
GW Warehouse: Typically 3-5 days to the UK, 3-7 days to other European countries.
USA Warehouse: Generally, 3-7 days to a USA address.
ES Warehouse: Generally, 2-5 days to the Spain, 3-7 days to the Portugal.
Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.
Note: This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control. Generally speaking, we offer free shipping for Loudhailer Low Voltage Buzzer BB LED Annunciator for 2 - 4S RC Helicopter Quadcopter Car Battery to United States (US, USA), United Kingdom (UK, GB), Germany, Italy, France, Spain, Portugal, Poland, Brazil, Russia, Japan, Greece, Austria, Hungary, Slovakia, Czech Republic, Ireland, Lithuania, Israel, Denmark, Norway, Sweden, Canada, Australia, Netherlands, Korea, Turkey, Mexico, Ukraine, Romania, Columbia, Thailand, Singapore, Malaysia etc. Please choose the shipping methods for the final price.

Payment accepts PayPal,Credit Cards,Wire Transfer,Westem Union, YandexMoney,Webmoney,Boleto,OXXO and BKM as secure payment methods.

The most convenient payment method in the world.
Wire transfer
For orders which exceed $1,500,please contact us at
Note: please email us the order number,the amount transferred along with currency type,and the exact date of the wire transfer.
Western Union
Please contact us at for details.
Note: please email us the following information after you have paid via Westem Union:
· Control Number(10 digits)
· The exact amount sent along with the currency
· Name of sender.
· Address of sender
YandexMoney、 Webmoney
With YandexMoney and Webmoney, it is convenient and safe for you to pay via credit card、wallet or cash
For Brazil customers, we accept Boleto: you only need to fill in the payment information, remember your Boleto Voucher information and pay it within 3 days at any Boleto stores.
For Mexico customers, we accept OXXO: you can choose OXXO payment on our website, and then remember your OXXO Voucher information and pay it within 3 days at any OXXO stores.

Do you want to bulk buy ? Please submit your wholesale inquiry below. Please note we usually don’t offer free shipping on wholesale orders, but the wholesale price will be a big bargain.

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