Features:
Input:5V 2-4A
Output:8.4V 2A
Conversion efficiency:92% (DC-DC Efficient conversion rate)
USB plug Specifications:USB2.0
length:100cm

USB power adapter Features:
Input voltage: AC 100V-240V 50-60Hz
Output:5V 3A

Package:
1  x  USB drive cable 
1  x  DC Coupler NP-FZ100
1  x  3A USB Adapter
1  x  Manual

Compatible With:
For Sony Alpha A9 A7RM3 A7RIII A7M3 ILCE-9

After the camera upgrades the firmware, some cameras will have a prompt problem when the camera is turned on.
(Can't guarantee battery safety and operation, continue to use?)
Need to choose "ok" to continue

note:
① In 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.
④Recommended example: Xiaomi 10000mAh Pro version (Model: PLM03ZM), Xiaomi 2 20000mAh (Model: PLM05ZM), ZMI 10 20000mAh (Model: QB820), CHOETECH 10400mAh (model: B618T) etc, or some TI chip TPS61088 high-quality mobile power bank.