YSD Bike Solar Tail Light with Solar Energy Charging Ability, Vibration Sensor, Photo Sensor, Reflector and Waterproof Function
This bicycle tail light will work in dim light and at night. It will not be ON but recharge in sunshine and in bright light. Vibration sensors switch included, it will be OFF without movements or vibration in 20 seconds. Also be ON as soon as you touch bike. Reflector and electronic components are made in Japan. The quality is reliable. Waterproof design includes drain hole, silicone seal and ultrasonic seamless welding. Nice humanization design, easily install on the chain stay, adjustable size. For details, please watch the video.
Easily install on the chain stay, adjustable size  Waterproof design: drain hole, silicone seal and ultrasonic seamless welding  Reflector included, it will be safer than like products.  Vibration sensors switch, bike tail light will be off without movements in 20 seconds. Also be on as soon as you touch bike.  High-bright flashlight
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YSD
{"Item Package Dimensions L x W x H": "2.44 x 2.4 x 2.01 inches", "Package Weight": "0.07 Kilograms", "Brand Name": "YSD", "Material": "Silicone", "Manufacturer": "MYT Technology Company", "Part Number": "MYT0011", "Date First Available": "June 5, 2017", "Brand": "YSD", "Power Source": "Solar Powered", "Water Resistance Level": "Waterproof", "Mounting Type": "Seat Mount", "Auto Part Position": "Inner"}