1. Waterproof Grade: IPX4 2. Operating temperature: -20-60 Celsius degree 3. Wireless Transmission Module: 433 MHz 4. Power Supply: DC5V 1A 5. Red Warning Light Luminance: 85 LM 6. Battery Capacity: 2200mAh 7. Endurance Time: Work for about 7 hours under constant bright 8. Remote Control Charging Time: About 1-2 hours. In the process of charging, the red light is on and the green light is on after full.

http://olla.gr/ipx4-85lm-waterproof-usb-bicycle-turn-signal-light-rear-light-taillight-with-remote-control/