The balance function can be executed before/after battery charged, or during battery charging process, to ensure battery pack keeping in excellent condition. Safe and convenient: it supplies instant voltage reading and indicates abnormal cell immediately. Allow Li-Polymer/Li-Fe 2-6 cell balancing and discharging. With its JST connector for external power, the balancer can measure voltage of receiver battery. The big LCD screen can show 6 cell batteries' condition. Only 3 control keys for easy single-handed control. Thermal design on the backside for ventilating and preventing overheating. Detailed instruction sheet is included. Small size and light weight, it is easy to carry.<br><br>Measurable battery type and amount: Li-Polymer/Li-Fe 2-6 Cell (standard voltage 7.4V-25.2V using divided voltage connector) Receiver battery 1.2V-12V DC (Not battery type limit, but need external power 7.4V-25.2V, use JST connector) Balance voltage setting range (lower limit): 2.0V-3.9V (pre-setting value 3.3 V) Discharge voltage setting range (lower limit): 3.0V-4.2V (pre-setting value 3.9V) Weight: 121g colour:Black Material:plastic<br><br>Package Contents: 1 x 3 in 1 Battery Balancer<br><br>Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.