Perfect for city commuting and evening road ridesthe all new cast tail lights are compact bright and durable usb rechargeable led tail lights that come at a price that wont break the bank. Features 16 cob leds delivers120 candela of intensity with over 180 degrees of visibility 2 steady beam modes and 3 flash modes for variable use and run time power and recharge indicator light displays current power or recharge status green10030% red 300% ipx4water resistantbullmicro usb charging port with micro usb cable included rubber o ring and different shapes of mounting shims for tool free installation on most seat posts integrated mounting clip for backpacks and bags ansi certified specifications dimension size 303022mm weight 19g each led 16 cobs material engineer grade plastic waterproof rating ipx4 mode lumen run time hl30 high steady 20lm for 2 hrs low steady 10lm for 4 hrs high flash 30lm for 4 hrs low flash 10lm for 10 hrs eco flash 5lm for 15 hrs mode lumen run time tl30 high steady 20lm for 2 hrs low steady 10lm for 4 hrs high flash 30lm for 4 hrs low flash 10lm for 7 hrs eco flash 5lm for 20 hrs battery 220mah lithium ion charge charge time micro usb 24 hr battery indicator 10030% green 300% red mount rubber o ring mounting clip