Specifications:Input power: WPC1.2Output: DC5V/1000mA (Max)Reaction temperature: -10 ~ 40 degreeWorking heat up range: below 20 degree (ambient temperature below degree)Working ambient humidity: below 80%Model: Samsung Galaxy S3/S4/S5 Samsung Galaxy Note 2/3/4Easy to operate: take off your phone's back cover -- stick the receiver pad to the phone's battery -- close the back cover -- place the mobile phone onto the wireless charging pad (not included). Package list:1 * Qi Wireless Charger Receiver for Samsung