ROCKBROS Bike Light Waterproof Cycling Helmet Taillight Lantern For Bicycle LED USB Rechargeable Safety Night Riding Rear Light

SPECIFICATIONS   Type: Bike Light Cycling Helmet Taillight   Name: Bicycle LED Rear Light Lantern Lamp Feature: Mini portable, USB Rechargable, Waterproof Mode: 5 Modes Lumen: About 20 Lumen Battery: Rechargeable lithium battery Size: About 3.1*2*4cm Weight: About 22g Function: Bike taillight, Helmet Taillight, Bag Warning Light Tip: Daily waterproof, Can't be soaked Power Supply: Battery Brand Name: ROCKBROS Model Number: TT30-WD Bike Rear Light Mounting Placement: Seatpost Certification: CE Choice: yes