Dimensions (Overall):40x40x22mm Mode: Steady-Breathing-Firework-Heartbeat-Pulse-Roadside warning-Off (pressed 0.8 seconds to turn off) with memory mode. Material:PC / ABS Weight:18g Protective Qualities:Weather-resistant / IPX4 LIGHT SOURCE:Red COB LED x 12pcs, Indicator light-Red/Green LED x 1 pc POWER SOURCE:3.7V/200mAh Lithium battery x 1pc Color:Red Recommended:Use Outdoor/camping/safety purpose Accessory:Bike Bracket, Head strap, Armband strap, 2 Silicon straps, USB cord.