Input Voltage:1.5V-3VOutput Voltage:5VOutput Current:500mAh-1500mAhOutput USB:Micro USBSize:17mm x 17mm x 18mm/0.66" x 0.66" x 0.7"(approx)Cable length:7cm/2.73"(approx)Color:Black,Blue,Red(Battery not included)Use 2pcs 5#AA/7#AAA Battery,Or 5# rechargeable battery.DC-DC quick charging boosted circuit built-in,use two pieces battery can boosted to 5V,transfer efficiency can reach to more than 90%,use new 5#AA battery can charge the android phone(2500mah battery) to 40% within 30 minutes.Built in protection circuit,when the AA battery used or the device charged full,it will stop charge by itself.Only need two pieces 5#AA or 7#AAA battery that very easy to buy anywhere then can charge your android phone/mp3/mp4/psp/gps anytimeMicro USB compatible:for Samsung Galaxy S3 S6/Edge S7/EdgeFor Samsung Galaxy S4 S3 S2 miniFor Samsung Galaxy Note 2 5For Samsung Galaxy Note 4/EdgeFor Samsung Galaxy A3 A5 A8For Samsung Galaxy Grand/Prime/CoreFor Samsung Galaxy J2 J3 J5 J7For HTC One M7 M8 M9 Desire E9 A9For LG Nexus 4 5 G2 G3 G4For Motorola Moto G3 / X3For Huawei Mate 2 7 Honor 6/Plus 7For Huawei P6 P7 P8 P8liteFor Huawei Honor X1/X2/4C/4XFor Xiaomi 2 3 4 Note RedMi 1/2For Oppo R7/Plus R3 R1For other Micro USB powered devicesQuantity: 1 pcNote:Transition: 1cm=10mm=0.39inchNo retail package.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!