Features:
Input:5V 2-4A
Output:8.4V 2A
Conversion efficiency:92% (DC-DC Efficient conversion rate)
USB plug Specifications:USB2.0
length:120cm
Replace the camera battery handle grip or carry more batteries,camera insert battery grip  will too heavy,is not conducive to taking pictures.
USB power adapter Features:
Input voltage: AC 100V-240V 50-60Hz
Output:5V 3A
Compatible With:
For EOS 10D 
For EOS 20D 
For EOS 20D EF-S 18-55mm Kit
For EOS 20Da 
For EOS 30D 
For EOS 30D EF-S 18-55mm Kit 
For EOS 40D 
For EOS 40D EF 28-135mm IS Kit 
For EOS 5D 
For EOS 5D EF 24-105mm Kit
For EOS 50D 
For EOS 50D EF 28-135mm IS Kit
 For EOS D30 
For EOS D60
For EOS Digital Rebel
Limited Edition Digital Rebel 
Limited Edition Digital Rebel kit 18-55mm Kit 
and more models.
Package:
Packag Includes:
1 x DC Drive Cable ACK-E2
1 x DC Coupler DR-400
1 x 5V3A USB Adapter
1 x Manual
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. 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.