This product is for the wireless charging of various small electronic products and power development. It is designed with a small form factor that is extremely easy to use, highly efficient, and low cost. Although it's primarily for charging cell phones, it can also be used for mobile electronics products such as gaming devices, fishtank, MP3, MP4, digital cameras, electric shavers, machine learning, medical supplies and other products of underwater applications. The charging module can be completely sealed to make it waterproof and dustproof. Input voltage: 9 -12V Maximum load current: 1.1A The max output voltage and current of receive: 5V / 2A, 12V / 700mA Transmitting coil size: diameter 43mm, thickness 2.3mm Transmitter module size: 18mm x 8.5mm x 15mm Receiving coil size: diameter 43mm, thickness 1.2mm Receiver Module size: 10mm x 25mm x 3mm Receive the best distance: 3 - 6mm Package included: 1 x Transmitter 1 x Receiver Resources: Product Usage Guide