5xDual Speaker Low Voltage Buzzer BB annunciator W/LED,2/3/4S Lipo battery 14.8v
5Pcs Dual Speaker Low Voltage Buzzer BB annunciator w/LED 2S-4S for RC Model Lipo battery


Function:
When testing full power(>3.6V)2S(7.2V)lipo battery 2 green LEO keeping light;
When testing full power(>3.6V)3S(10.8V)lipo battery 3 green LEO keeping light;
When testing full power(>3.6V)4S(14.4V)lipo battery 4 green LEO keeping light;
When boltage <3.3V,it will buzzer with red LED light;
Really usefull in flight if you cant see the lights.

Features:
Test 2S-4S lipo Battery.
Small and portable low voltage alarm, with a very loud buzzer.
Also has a low voltage indicator led panel.

Specifications:
Used for: 2S-4S lipo Battery
Package size: 7 * 6 * 4cm / 2.8 * 2.4 * 1.6in
Package weight: 41g / 1.4oz

Package list:
5 * Low Voltage Buzzer BB annunciator