Solar Watch Charger Two size silicone rings for ECO watches Comes with two silicone rings, the big silicone ring is suitable for men's solar watch, and the small silicone ring is suitable for women's solar watch. Solar watch chargers provide power No way heat up your watch Sunlight is the best light source for charging a solar watch, but it's not available 24 hours x 365 days. Solar watch chargers provide light intensity similar to direct summer sunlight, but in no way heat up your watch. LED lights as the charging light source Charge all kinds of solar watches The solar charger uses LED lights as the charging light source to charge all kinds of solar watches. Charge your fancy/expensive eco-solar watch with a simple USB power source. ECO Watches Power Base Comes with two soft rubber covers Comes with two soft rubber covers for men's and women's solar watches. It works with all solar watch brands. Powered by USB No Overheat Overheating from overexposure to direct sunlight or too close to conventional electric lamps can damage the accessories on the dial as well as the watch movement. Durable and easy This solar battery box accessory includes a 5ft (1.5m) USB-C cable to help you charge easily anywhere, durable and easy to connect.