Features: Replace 9V battery power supply cord,This eliminates the need for 9V batteries,2in1 design,Power supply by USB charger or power bank and more. 9V Battery Eliminator / Replacement cable - Replace Your 9 Volt Batteries Forever and Save Money and protect envilement. 9V Battery Terminal male is Positive,female is Negative,as the same as 9V 6F22 Battery,Input USB 5V,output dual for DC 9V,but this cable can not use to charge 9V battery. Some mobile power bank sources have an automatic power-off function, and the output current of 90mA will automatically power off. It is recommended to use wall USB Adapter. Suitable for Digital Multimeter Tester Microphone Remote and more 9V devices,can powered 2pcs different 9V devices at the same for time. Recommended for a variety of devices including smoke alarms, digital cameras, game controllers, toys, and clocks and more 9V devices. Specification: Material: Plastic Color: Black Material: Plastic input: 5V/2A output: 9V 0.7A Power Cable length: 100cm,200cm,300cm(optional) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1x 9V Power Supply cable