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 1 led delivers 50 candela of intensity bull2 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% ipx4 water resistant micro 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 303025mm weight 20g each led 1led material engineer grade plastic waterproof rating ipx4 mode lumen run time hl10 high steady 10lm for 2 hrs low steady 5lm for 5 hrs high flash 10lm for 4 hrs low flash 5lm for 14 hrs eco flash 5lm for 20 hrs mode lumen run time tl10 high steady 10lm for 2 hrs low steady 5lm for 4 hrs high flash 10lm for 6 hrs low flash 5lm for 8 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