Input voltage: 5V; Battery over-discharge protection voltage: 2.5V; Batteryovercurrent protection current: 3A; Connect the battery to the B + B-, inserted into the USB female mobilephone charger, the red light is being charged, the green light to full.Charging indicator: Charging - Red light;Fully charged - Blue lightThe charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.Adjustable charging Current: With liner charging way, the charging current is adjustable, maximum to 1AOn-board -USB and soldering joints 5V input`port and charging status indicator(red indicator is charging,green indicator is full charged)colour:BlueMaterial:plasticPackage Contents:6 x for TP4056 Charging ModuleOnly the above package content, other products are not included.Note: Light 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.