1. Double battery pack balance discharger can manage two ebike batteries which fixed on your bike, lower power consumption design, real-time detect the voltage of both two battery packs, battery on-line check. The nominal voltage of battery is 20V-72V.2. This module can make both two batteries to discharge together to power the ebike, it will auto compare the voltage of each battery and adjust the current output for each battery, the current output for each battery will be same if the voltage of each battery is same.3. The module will stop power output when voltage lower than the cut-off voltage to protect the battery.4. This module has 2 input connector and 1 output connector, cable length is approx 90mm, 2 Pcs Input XT-60 male,1 Pcs Output XT-60 female.Colour:blackMaterial:aluminum alloySize: 60 x 45 x 18mmPackage Contents:1 x Dual BatteryOnly the above package content, other products are not included.Note: Light reflection 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.