LED indicator: "" LED is charging status indication, "OK" LED is fully or in constant voltage mode. Wide range of uses High safety performance Easy to understand and easy to operate Battery overvoltage protection : 2-Cell(2S) 8.4V version: Input voltage: DC 3-6V (recommended DC 3.7V 5V) Input current: 2A(2A Version) Charging voltage : 8.4V Charging current: 1.1A(2A Version) Working environment temperature: -40℃ to +85℃ Colour:red Material:PCB Size:39x18x 6.3mm Package Contents: 1 x Module Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.