Bike Locator Alarm is an alarm and a wireless device to locate your bike and to send warning siren to prevent your bike to be stolen Key features/specifications: Bike locator alarm with rotating holder to mount to the bike frame Compact size key chain with press button to locate bike position Alarm device with 110dB loud siren with flashing LED indicator Built-in vibration device to send out warning siren if anyone intends to steal the bike Flashing light can be use as a bike light Wireless RF 433MHz/315MHz, transmit distance up to 100m Alarm power: 3VDC 2 x AAA battery Key button power: 12V 1 x 23A battery Alarm dimension: 68 x 54 x 25mm Key button dimension: 46 x 42 x 16mm Digital 256 combination codes