Memory Card Reader -Wifi TF Card Reader Memory Extender Wireless Storage Flash Drive Silver Highlights Generic Brand Wifi TF Card Reader Memory Extender Wireless Storage Flash Drive Silver Description: This device needs to connect an external power source, without a battery. The TF card must be inserted in this device to be used. You need to download the app to your mobile phone before using it. The accessories micro USB cable is with data reading function. It can be used to upload and download TF card date. And it can be used as a flash drive. The device will transmit the WiFi signal when it connects to an external power source or mobile power source. One click to download, easy to use. Built in 700mAh battery, has playtime up to 6 hours. You can charge it using the supplied Micro USB cable. It takes one to two hours to fully charge it. specification: Material: aluminum alloy+pc Size: 8x3x1cm/3.14x1.18x0.39inch Input voltage: DC 5V Working current: 100mA/h Interface: TF card slot Support system: Android 3.0 or above, IOS 5.1.1 or above Package includes: 1 Piece Wireless Storage Box (TF card is not included)