Features: It is specially designed for Samsung Galaxy Note 2. Ultrathin design, compact and light weight without increasing additional weight of the Note 2. Adding wireless charging feature by piggybacking it on the battery of Note 2, it works well with any Qi-enabled charger. The receiver can be attached to the the battery all the time, and it would not interrupt the normal use of the Note 2.How to use it: Step 1: Open the back cover of Samsung Galaxy Note 2; Step 2: Stick the receiver card to the mobile phone's battery and the two protuberant touch points must touch the two recesses next to the battery; Step 3: Close the back cover; Step 4: Place the mobile phone onto the Qi wireless charging pad (not included).Specifications: Color: Green/White Input power: WPC5W Output: DC5V/650mA (Max) Charging current: DC5V/500mA (Max) Charging time: 7.5 ± 0.5hrs Reaction temperature: -10 ～ 40℃ Working heat up range: ≤20℃ (ambient temperature ≤25℃) Working ambient humidity: ≤80% working life: Charge & discharge ＞ 4000 times Size: 62 * 45 * 1mm / 2.44 * 1.77 * 0.04in Weight: 5g / 0.17ozPackage list: 1 * Qi Wireless Charging Receiver for Note 2