USB charging port. Quite bright and lightweight. The battery is like new and lasts for several days. Stylish appearance. Tail lights are an important accessory to increase visibility. - Brand: Cerberus - Brand: Moon - Color: Black - Type: Tail Light Thank you for viewing. Color: Black Brand: Moon Material: Other Power Source: Battery-powered Water Resistance Level: Waterproof Item Weight: 35 grams Maximum Brightness: 150 lumens; Maximum Usage Time: 140 hours; Lighting/Flashing: 5 patterns; Continuous Lighting: 3 hours 30 minutes (25 lumens), 1 hour 45 minutes (50 lumens); Flashing: 20 hours 15 minutes (25 lumens), STEADY Flash: 13 hours 45 minutes (25 lumens), DAY Flash: 19 hours (150 lumens); VLS Lumen Adjustment Function/Lighting: 1 hour 45 minutes ~ 18 hours 15 minutes (50~5 lumens); Flashing: 5 hours ~ 44 hours 15 minutes (100~10 lumens), STEADY Flash: 6 hours 15 minutes ~ 17 hours 15 minutes (100~10 lumens), DAY Flash: 19 hours ~ 140 hours (150~10 lumens); Charging Time: 2 hours; Weight: Light body 35g; Size: 18x27x64mm (WxDxH); Mounting Compatibility: 20~52mm; Waterproof: IPX 7 Contents: Cerberus<br>CE-PP (Rubber Pad)<br>3 O-rings for mounting:<br>RS-D (fits 20-26mm diameters)<br>RS-E (fits 26-35mm diameters)<br>RS-F (fits 35-52mm diameters)<br>USB-C (USB cable) Weight: Light body 35g Mounting Compatibility: 20~52mm Waterproof (IPX 7) Included Accessories: Rubber pad, 3 sizes of rubber bands, USB charging cable