USB rechargeable bike tail light
Material: Aluminum Alloy; Size: 10*2.7*2.3cm;  107g
IP55 water resistant, rain-proof
LED source: COB LED white/red/blue light ; max ouput: 1W 
Operation Modes: 5 model for double light, 6 modes for singal light
Battery type: 3.7V/500mAh built in lithium ion battery;
Light output: white light 50lm, red 15lm, blue 10lm
Charging time: 2h, discharging time 2-8hours

package: tail light, USB Cable, bracket & color box