Portland Design Works' Spaceship 3 Headlight/Radbot 500 Taillight Set offers bright LED lights, front and rear, for super nighttime visibility. The Spaceship 3 headlight focuses three brilliant LEDs through a precision lens, illuminating your course ahead. Powered by 2xAA batteries, the Spaceship 3 includes both steady and flashing modes for up to 100 hours of run time. Includes the Mission Control 2.0 mount. The RADBOT 500 is equipped with a blazing 0.5 watt LED and a large precision reflector to provide visibility to your backside. Powered by 2xAAA batteries, the RADBOT has three modes: zZz pop, Cornea Blitz and Rock Steady for up to 30 hours run time. It also features an on/off switch that must be depressed for 1.5 seconds to turn the light on and off. This helps prevent the RADBOT from being accidentally turned on when you're transporting it in your pocket or bag off the bike. Spaceship 3: - Three bright white LEDs - Runs on 2xAA batteries (included) for up to 100 hours of run time - 2 Modes: Steady and Flashing - Weatherproof exterior for all season riding - Includes Mission Control 2.0 mount - Weight: 91 g (3.2 oz) - Lifetime PDWarranty Radbot 500: - 0.5 watt red LED made by Nichia - 3 Modes: zZz pop, Cornea Blitz and Rock Steady for up to 30 hours run time - Large precision reflector - Includes both Stayputnik quick release and Rack mounts - Weatherproof exterior for all season riding - Runs on 2xAAA batteries (included) - Weight: 62 g (2.2 oz) - Lifetime PDWarranty