Features 1、Real Time Detection: The alarm detects the discharge voltage of each battery of the lithium battery pack in real time. 2、Sound and Light Warning: When any battery voltage is lower than 3.0V, the alarm will sound and the light will flash, double reminding. 3、Life Prolonging: The alarm reminds you to replace the battery and charge in time, prevents over discharge, effectively protecting the service life of the battery pack. 4、Small and Light: Using precise IC, all components are SMD, small size and light weight, suitable for any aircraft, vehicle and ship models, without adding additional burden. 5、Applicable Battery: The low voltage alarm is suitable for all 2S to 3S lithium battery packs, with perfect compatibility. Specification Item Type: Lithium Battery Low Voltage Alarm Material: PCB Package List 5 x Lithium Battery Low Voltage Alarm