Induction Cycling Rear Lights Bike Seatpost Taillights Taillights Bicycle Lights Bike Rear Light Safety Warning Lamp Lumens: 30LM Lamp bead model: LED Battery capacity: no battery, magnetic induction power generation Battery life: your physical strength determines the battery life Mode: 2 modes Lighting distance: 20 meters Waterproof rating: IPX4 material: plastic Installation method: seat tube type Product weight: 80g Product size: 5.6*3.6*3 Package Included: 1pc of Bicycle Tail-LighWe only provide one magnet_x000D_ Features: 1. Night riding adds safety to night riding: the visibility of night riding is reduced, there is a certain safety hazard, and the occurrence of accidents is reduced 2. IPX4 waterproof: made of high-quality materials, sealed and processed, it has a strong waterproof effect, whether it is heavy rain or humid fog will not affect the normal life and brightness of the car lights 3. Adjust the upper and lower angles of the taillights to better warn the rear: just slightly rotate the adjusting knob, you can rotate the upper and lower positions of the taillights 4. Magnetic induction power generation, continuous battery life: no battery, no charging, self-powered 5. Seat tube installation, not easy to fall _x000D_ _x000D_