The siren has self-battery, it will give you warning when the cable is cut.

New design zinc metal big display LCD remote
- Remote built in vibration motor, remote have vibration function
- Real time clock and parking timer (display the time parking the car)
- Auto lock / unlock and arm / disarm function (Auto Arm when Departing Car and Auto Disarm when Approaching Car)
- Timing auto start engine (start engine on programmable time, used with RSV1 / RSV2 control unit)
- Periodically auto start engine (every 1,2,3,4,8,24 hours auto start engine, used with RSV1 / RSV2 control unit)
- Key lock function to protect pressing keyboard by mistake
- Carrier modulation: FM - FM technology
- Remote transmission distance to main unit around 1000m
- Remote feedback range to transmitter up to 1500m
- Extra high light emerald green and blue LCD back light
- Use AAA 1.5V Alkaline battery (Battery life is about 2-6 months)
- Trunk release
- Two stage shock sensor
- ultra sonic motion sensor (OPTIONAL)
- Override shock sensor function
- Emergency disarm and reset with car key
- Engine immobilizer
- Auto re-arm function, Anti-theft and anti-hijack function
- 2 transmitter can alarm at the same time
- Blue super bright LED alarm indicator
- Can used with remote start engine control unit
- Keyless entry , central lock / unlock control car alarm
- Transmitter control arm disarm auto security system
- Accept Redesign by customer request
- Double side PCB, full SMT technology
 Two transmitters