Name: Bicycle taillight Colour: Black. red. blue. yellow. Size: 4cm*1.5cm Weight: 51.2g (including package) LED: COB LED lumens: 10 lumens Battery: rechargeable polymer lithium battery Battery capacity: 220 mAh Charging time: about 2 hours Working time: 6~56 (max) hours Note: Please take the actual working time as the standard Mode: 5 mode. 100% brightness - 50% brightness - flash - slow flash - warning Suitable for: Night warnings. Cycling. Helmet. Running. etc.