1.3in1 METER Cell Voltage balancer discharger(Discharge Power Max 5W). 2.Use for Lipo/Li-Fe/LI-Ion/Nicd/NiMh. 3.Volt tolerance:3mV,Simple use,high accuracy. 4.Use for Lipo/Li-Fe/LI-Ion:2-6cells. (standard voltage 7.4V-25.2V using divided voltage connector). Receiver battery:1.2V-12V DC (not limit battery type, but need external power 7.4V-25.2V, use JST connector. ) 5.Balance voltage setting range: 2.0-3.9V,Discharge voltage setting range: 3.0-4.2V. 6.*** Note: This battery balancer is forbidden using 2 or more ports at a time, otherwise it might be burnt for over current!!!