Unicycle Accessories features: This professional bike taillight, made of premium material, is strong and durable for lasting use. It can be well fitted to your mountain bike. Rechargeable, detachable and make you easy to ride. Features the waterproof design, which means you can overcome rainy and snowy weather with it. Features-Color: Red-Material: Plastic-Size:4.30X3.00X2.80cm/1.69X1.18X1.10inch-USB rechargeable, easy and convenient to charge, bring you more convenience.-Excellent structure sealing, which ensures the good waterproof effect, perfect for outdoor riding.-Features the waterproof design, which means you can overcome rainy and snowy weather with it.-Adopt high-quality and waterproof material with stable performance and long service life.-The bike taillight can be easily loosened and fixed without any tools. Specification-Light mode: 6 modes.-Lighting time: 3-12 hours.-Charging time:It takes an hour to fully charge.-IP rating:IPX5.-The capacity ofli-lionbattery: 230mAh.