1. Portable Mobile Power Module. 2. Supports 3 Usb Cables. 3. And Hold The Button After Standby To Power The Led Digital Display. 4. When Charging, The Led Digital Screen Displays The Current Battery Level. 5. When Discharging, The Led Digital Screen Displays The Current Power, Saving About Of Display Time (Double-Click The Button To Resume The Display). After Charging And Discharging, The System Provide Accurate Battery Indication. Charge Voltage: 4.5~5.5V Input Voltage: Input Voltage B+ To B- 3.0~4.2V Detection Voltage: 4.200.05A Release Voltage: 4.1000.05V Detection Delay Time: Less than 200 MS Detection Voltage: 3.00.10V Release Voltage: 3.100.10V Detection Delay Time: Less than 100 MS Constantcurrent: 2A Short Detection Delay Time: Less than 50uS Releaseconditions: Cut Off Load Normal Current Consumption Of Pcm: Max 60ua Stanby Current Consumption: Max 50ua Allowed 0v Change: Y Max Charge/Discharge Current: 1.5/2A Suggest Working Temperature:-5~45 Ir Of Pcm:65m Size:about 65 x 25 x 5mm Charge Voltage: 4.5~5.5V Charge Threshold:Vbat (Th)=3.0V type:A: 5V 2.4A three charging ports Colour:green Material:PCB Package Contents: 2 x 18650 Lithium Battery Charging Module Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Only 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.