The main unit is not battery-powered, but a rare Type-C rechargeable type. Shipping includes only the items in photo 2 (no instructions, etc.). For theft prevention of your valuable bicycle or motorcycle. Remote control on/off Intimidate with a loud volume Sensor level can be set in 7 stages, making it convenient to adjust according to residential areas and locations. 113dB ultra-loud vibration alarm Detects shocks from prying open locks or doors, or kicking the vehicle body, and sounds an alarm, preventing theft of the vehicle itself, theft of items inside the vehicle, and vandalism. This is the minimum necessary sensor for a car security buzzer, and it is perfect when combined with other sensors depending on the situation. The 113dB ultra-loud volume repels intruders and suspicious persons. SOS function When the SOS function is enabled and the security mode is disengaged, if the vehicle tilts more than 45 degrees, the alarm sound will automatically play to alert the surroundings of the abnormality. Bicycle Motorcycle Boat Car Theft prevention Anti-theft measures Simple security system Honda Yamaha Suzuki Key Lock