When a sport or activity calls for a safety light, the Tyto lamp is the perfect solution. Extremely compact and waterproof, this light can be attached to headbands, jackets, bikes, backpacks and much more by a full range of users. This model comes with two safety light modes— constant and blinking.Attach this to your dogs collar to stop it from disappearing if you're walking them in winter.Specifications:Colour: Red or WhiteLight source: 3x LEDsPower source: 2x CR2032 (Included)Discharge time: 30 hoursWeight: 25g