Never be without a charge with this lightweight, easy to use wireless charger. Each charger includes a micro USB charger and puts out 5 Watts of charge with a range up to .32 inch. Directions: Connect micro-USB cable to wireless charger and plug into preferred power source. When device is fully charged, a blue ring will appear on charging station. To have a successful charge we recommend removing your phone case prior to charging phone. Supports wireless charging phones: Samsung: Note8/S8+/S8, Note5/S7, edge/S7/S6, edge plus/S6, edge/S6. Apple: iPhone8, iPhone 8plus, iPhone X, etc. Device: 3.7 w x 3.7 inch h x 0.25 inch d. Micro USB cable is approximately 8 inch long.