Nite rider sentinel 150 rear lightnite riders sentinel 150 delivers the everyday reliable performance you require from a rear light the sentinel 150 features 5 modes an easy onoff seat post strap mount with quick release tab low battery indicator and the cream of the crop the rear light is usb rechargeable making it ideal for commuters and cycling enthusiasts alike powerful rear lightthe nite rider sentinel 150 incorporates three powerful leds to produce a retina searing daylight visi