Fangrui Product Details Features: 1. Developed And Designed For Wireless Charging And Power Supply Of Various Series Of Current Small Electronic Products. It Has The Characteristics Of Small Size, Easy Use, High Efficiency, 2. Mainly Suitable For Mobile Electronic Products Such As Game Consoles, Fish Tanks, Mp3, Mp4, Adult Products, Digital Cameras, Electric Shavers, Learning Machines, Underwater Products And Other Product Applications; 3. Due To The Use Of Contactless Charging And Power Supply, The Product Can Be Completely Sealed, Waterproof And Dustproof; 4. Increase The Service Life Of The Product And More Convenient To Use 5. If The Current Is Small, The Number Of Turns Of The Receiving Coil Can Be Appropriately Increased To Increase The Transmission Distance. Description: 1. Transmitter Module Size: About 17x11x2.3mm 2. Transmitter-receiver Coil Size: About 40x1.8mm 3. Connection Mode: 1 Pin Connects To Power Negative; 2 Pins Connect To Power Positive; 3 And 4 Pins Connect To External Transmitting Coil. 4. Transmitter M