RL321R-USB

High-powered 1/2 watt and super-bright LEDs create four modes on steady(two eyes), steady(0.5W), steady(0.3W) and Superflash
Eye-catching technology maximizes your visibility to other road users
Compact vertical design and waterproof
USB rechargeable lithium polymer battery and battery charger with overcharge protection circuit
Two mounting brackets and clip for multiple mount options
Run times: 2.5 hrs (steady-two eyes), 4hrs (steady-0.5W), 24 hrs (steady-0.3W) and up to 25 hrs (Superflash)
Charge time approximately 3.0 hrs
Weights: 44 grams