Item Description:Description:Lipo Battery Low Voltage Tester Checker 1S-8S Buzzer Alarm with LED Indicator for RC Helicopter for RC Drone / Helicopter / Boat / PlaneEasy to use - works with any 1-8S Lipo/Li-Ion/LiMn/Li-Fe RC drone battery. Protect the battery from overcharging and overdischargingJust plug into the balance plug and the LED will cycle tough the cell voltages as well as list the total voltageYou can set the alarm from 2.7 to 3.8V per cell or you can turn the alarm offSuper loud alarm sound makes it easier to find your droneSpecification:Voltage detection precision: ±0.01VUnit voltage display range: 0.5-4.5VTotal voltage display range: 0.5-36V1S test mode voltage range: 3.6-32VLow voltage alarm mode for: 2-8SAlarm set value range: OFF-2.7-3.8VDisplay: LEDWeight: 11gSize Chart:Size: approx. 40 x 25x 11mm/1.57 x 0.98 x 0.43inchPackage Includes:1 Piece LiPo Battery CheckerItem Specification:Material: MetalSize: 40 x 25 x 11mmUse: Vehicles & Remote Control Toys