VDO lighting set This lighting set has a strong beam of light. You are visible up to 400 meters away. The rear light can burn for up to 7 hours and the front light for up to 9 hours. The handy thing is that both lights are rechargeable via a USB connection. Specifications: Color: black Gender: unisex Material: plastic Dimensions: 30 x 21 x 6.5 cm (L x W x H) Weight: 160 grams Power supply: rechargeable via USB Number of lumens: 30 Front light closure: rubber strap Rear light closure: 2-O rings