Features:
Input:5V 2-4A
Output:8.4V
Conversion efficiency:92% (DC-DC Efficient conversion rate)
USB plug Specifications:USB2.0
length:100cm
Replace the camera battery handle grip or carry more batteries,camera insert battery grip  will too heavy,is not conducive to taking pictures.
Compatible With:

DC drive cable It works wonderfully:
For Canon EOS 100D (kiss x7) 
For Canon EOS Rebel SL1 
Package:
Packag Includes:
1 x  DC drive cable ACK-E15
1 x  DC Coupler DR-E15
1 x Manual
Especially recommended with this use, convenient indoor access home electricity, long time use. please use 15w usb power adapter .(5V 3A)
note:
①In order to make your camera work better,please use a high-quality mobile power, mobile power bank is output guarantee of at 5V 2 AMP to 4 AMP current(USB adapter Output guarantee 5V 2.4A-3A). When the power is not enough, will not start or can not shoot properly, Please select a larger current of at least 2.4A, DC 3 Amps or more is better.
②Do not use the computer USB supply for the camera,because most computer USB 2.0 output voltage is 5V,But the current is less than 500mA.
③Some mobile phone / tablet usb charger with identification resistance, can not identify the camera, the current can not meet the requirements, it is not recommended.