The Lighthouse Elite Rechargeable LED Bike Light Set utilises the latest technology in portable lighting, allowing extremely bright LED lights to be encased in lightweight and compact units. The front light features 3 light settings high 100%, low 50%, strobe. Whilst the rear light has 6 settings high, medium, low, fast flash, slow flash, strobe. The bike light output modes are controlled by a sequential switch. Press and release the button to switch between modes. Hold the button down for 3 seconds to turn the lights off. Rechargeable, can be charged via any USB port with the supplied cable. Specification Brightness Front 150 lumens, Rear 100 lumens Run Time Front 2.5/4.5 hours, Rear 10 hours Light Source Front XPG 3W LED, Rear COB LED Battery Front 3.7V 800mAh Li-Polymer, Rear 3.7V 330mAh Li-Polymer Charge Time approx. 5 hours Water Resistance IP54 Impact Resistant 1m Dimensions Front 62 x 30 x 30mm, Rear 41 x 41 x 38mm Weight Front 52g, Rear 37g