Description : The remote control supports two way sound alarm, adds extra safety. It supports the function of preventing the battery from being , if the battery is abnormal, the remote control will alarm. 5 adjustable alarm sensitivity to meet your various demands. It adopts special coding technology, witch makes it anti-copy and anti-decryption. Specification: Item Name: B9 Car Remote Control Material: Electronic Components, Metal Battery: AAA battery (not included) Static Working Voltage: 10-16V (D.C Direct Current Power Supply) Static Working Current: andlt;8mA Applicable Working Temperature: -20 Degrees Celsius - +80 Degrees Celsius Features: Simple Operation, Anti-theft, Practical, Two-way Alarm Size: 7.8cm x 4cm x 2.5cm/3.07" x 1.57" x 0.98" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.