Control and synchroniseKey Features:The heart of the SYNC lighting systemPremium textured polycarbonate body500 Lumens output for maximum visibilitySuperior side-on visibility for added safetyCustomise modes via the SYNC appPower button communicates pairing & battery infoGREEN ONother lights are pairedOFFpaired light(s) disconnectedGREEN FLASHlow battery on rear light(s)RED FLASHlow battery on Core headlightMode: Output, RuntimeHigh: 500 Lm, 2 hrsMiddle: 150 Lm, 9 hrsLow: 100 Lm, 15 hrsDaytime HyperConstant: 500 / 100 Lm, 18 hrsFlashing: 100 Lm, 130 hrsCharging Time: 3-6 hrs (USB 2.0)Weight: 94g incl. Flextight bracketGenuine Innovation From The Market Leader - A Smarter Solution For AllCatEye SYNC is an easier, quicker and safer lighting solution for all types of cyclists, from commuters to enthusiast riders. CatEye SYNC offers:Multiple lights in SYNCJust one touch SYNCs allSmarter visibility, day or nightAll angles, coveredBe seen all-round, year roundRoad Safety Research