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This module comes a pair of receiver and transmitter, with 19 mm diameter coil. Now you can easily build up your 5V phone wireless charger!
This product is for the current series of mobile phones and a variety of small electronic products, wireless charging, power development and design is made with a small size, extremely easy to use, high efficiency, low cost features. Mainly used in mobile electronics products, such as: mobile phone , game, fish tank, MP3, MP4, adult products, digital cameras, electric shavers, machine learning, health care, water supplies and other products applications; since using non-contact charging power supply, make the product completely sealed, waterproof dust; extend product life, easier to use.
Note: Do NOT reverse connect power pin on transmitter, do NOT short connected the receivers pins, do NOT put the coil close to large area metal material.