Bicycle Rear Back Light Smart Brake Lights USB Rechargeable Cycling Flashlight 5 Modes Safety Warning Motorcycle Helmet Lamp 201204

USB Rechargeable Bicycle Rear Back Light Smart Brake Lights 5 Modes 16 Leds Safety Warning Lamp Flashlight for Cycling Helmet Specifications: Housing material: PC Engineering plastics. 6063 Aluminum alloy. Dimensions: 39.5 x 29mm. Battery: Rechargeable Lithium polymer battery. Brightness: 20Lm. Use time: Strobe(9h),Slow strobe(56h),Meteor(14h),Windmill(17h),Breathing flash(8h). Features: Adopt high brightness SMD LED , high brightness and long life. Using high quality lithium polymer b