ICEdot Bike Helmet Mounted Crash Sensor - Yellow COMPLETE SET: The ICEdot Sensor Crash comes with a helmet mounting clip, zip ties, and a USB to Micro USB Charging Cable. LONGER ADVENTURE TIME: With its batteries being rechargeable, you get to enjoy more biking time adventures. It can be used for approximately 20 hours, and stay on standby for around 30 hours. BLUETOOTH SMART: This sensor works with the use of Bluetooth Low Energy, to reduce battery power consumption. Your batteries are well kept from draining easily. It currently connects with iPhones, 4s or later and android phones running 4.3 above. (BLE 4.0 Required). SAFER RIDE ALONE: With the ICEdot Crash Sensor innovation, you can go alone on treks and exploits with peace of mind. You are sure that your loved ones will be notified in case of emergency, and you are far safer than when no one knows what happens or happened to you. GO PREMIUM: When you purchase an ICEdot crash sensor, you are entitled to a 1 Year Premium ICEdot Membership.