5xLipo Battery Voltage Alarm Indicator Checker 2-4S LED Display for RC Quadcopter
5Pcs Loudhailer Lipo Battery Voltage Alarm Indicator Checker 2-4S LED Display for RC Helicopter Quadcopter Car Battery


Functions:
Tested battery cell voltage (> 3.6V) 2S LiPo battery: 2 green LED lights on
Tested battery cell voltage (> 3.6V) 3S LiPo battery: 3 green LED lights on
Tested battery cell voltage (> 3.6V) 4S LiPo battery: 4 green LED lights on
Cell voltage < 3.3V, corresponding red light will on and alarm will be sounded


Specifications:
Used for: 2S-4S lipo battery
Quantity: 5Pcs
Package size: 8 * 6 * 4cm / 3.1 * 2.4 * 1.6in
Package weight: 28g / 1oz

Package list:
5 * Loudhailer Lipo Battery Voltage Alarm Indicator Checker