UKSPORTSCHAT: \"It is a solid build, lasts plenty long enough for most night rides and has an array of cool and handy features to keep you riding safely in the dark.\" 600 Lumen output ECO-Reflex Optical design incorporating anti-glare Crysta-Lite lens – Creates total reflection and refraction to transmit a more effective light beam Near range low trajectory beam – to avoid blinding oncoming traffic. Utilises American designed CREE XD 16 LED light source: Delivers premium luminaire performance Battery level indicator USB rechargeable (USB lead included) Battery type: Premium Samsung Lithium-ion rechargeable Battery Capacity: 2600m Ah Voltage: 3. 7V Waterproof: resistant to splashing water or rain to IPX-4 rating Easy mounting with supplied bracket – no tools required Function modes: High / Medium / Low / Flash Run time constant mode : 2 hours (full beam), 2. 5 hours (half beam), 3. 5 hours (low beam) Run time flash mode: 7 hours (fast flash), 14 hours (low flash) Size: 147 x 42 x 40. 5mm Weight: 186g Material: Aluminium, ABS, PMMA