Headlight Description: Bulb: CREE bulb Brightness: 1 low light 120 lumens. Second gear strong light 160 lumens. High frequency flashing 10HZ/S Lamp life: 100,000 hours (theoretical value) Voltage: 3.6-4.81V Battery: 3 x No.7 or 18650 batteries Surface treatment: hard anodized titanium black Lens material: imported UCL lens Switching method: Push button switch at the end Size: 104mm(113mm)34mm(Max) Protection class: IP6 Tail light description: Made of VYI high hardness plastic, no problem of breakage while riding. High brightness, using authentic A-grade light head, the front built-in reflector bowl, but also make the brightness on the basis of a further 30%. Bright exterior, easier to install the battery. Can be disassembled with a dime. Power supply: No. 7 batteries*2 (not included in this product) Light stand description: 7 light changing modes, quick release design, waterproof and shockproof, especially suitable for off-road bikes and friends who often ride at night This light is suitable for installation on seatposts below 30MM, and can be mounted on the rear fork tube of the bike for those who can't fit the seat tube. The size of the torch buckle and handlebar buckle can be adjusted by means of a gong, suitable for 2.7-3.1cm diameter torches; also suitable for 2.3-3cm diameter handlebars, with elastic plastic inside, which can be adjusted for tightness by thickening or loosening. Fixed to the handlebar is a quick release buckle, so the light can be put on or taken off at any time, making it very easy to use.