Features:. The three-in-one battery balance display uses a large LCD screen, which can display the voltage value of up to 6 strings of lithium batteries at the same time. Designed for polymer lithium batteries and lithium iron phosphate, accurately measuring the total battery voltage and cell voltage, performing balancing operations on multiple series cells. The battery can be discharged to facilitate long-term storage and avoid damage to the battery. The 3-in-1 battery balance function display allows the battery to balance the function system before and after charging or before (discharging). The product is suitable for players over 14 years of age. Specifications: . Color: Black . Material: Plastic + Electronic Component. Support battery type: li-po/li-fe 2 - 6 cells. Nominal voltage: 7.4V - 22.2V, using pressure tap . Receiver battery: 1.2V - 8.5V DC . Not limited to battery type, but you need to connect 7.4V - 11.1V, use JST connector . Balance Voltage Setting Range (Lower Limit): 2.0V to 3.9V (default 3.3V). Discharge Voltage Setting Range (Lower Limit): 3.0V to 4.2V (default 3.9V). Discharge current (4.0V/cell): about 450mA . Weight: 85g . Size: 10.5 x 6.5 x 2.2cm/4.13 x 2.55 x 0.86in Package Contents: . 1 x Balancer