home alarm system is a simple home alarm,you could edit the SMS randomly. It's DIY alarm, you could install it by yourself.

Features:
10 seconds self-recording alarm voice will be sent out when alarming.
Auto alarm or disarm will be set according to your need.
Adopts GSM 850/900/1800/1900 bands ,can be used all over the world.
Arm delay function and alarm delay function, the delay time is adjustable (00~99 second).
Full duplex communication with the base.
Monitor living surrounding.
Voice and message alert.
Set alarm on or off by remote controller.
Call in to set alarm OnOffMonitorOutput.
Send SMS to set alarm OnOffMonitorOutput.
5 group phone+room number.
1 group alarm center monitor phone.
2 group phone number to report arm and disarm status.
Programable 7 group alarm TEXT messages.
3 zone for wired detector.
16 zone for wireless detector.
Easily set on or off every wired or wireless detector.
1 relay output to power on camera when alarming.
2 output for cooker air-condition and other home appliance.
SMS inform external power failure or recovery.
Indoor and outdoor alarm controller.

Built-in back-up battery

Technical Parameter:
Operating Voltage: DC 12V
Static Current: ≤20mA
Alarm Current: ≤400mA
Wireless Receiving Frequency: 433MHz±0.5MHz/315MHz±0.5MHz
Wireless Receiving Sensitivity: 433MHz±0.5MHz/315MHz±0.5MHz
Anti-interference: 1V/mfrequency:20-1000 MHz
GSM frequency: 900/1800/1900MHZ
Outer Alarm siren volume: 110dB
Working condition: Temperature: -1050
Humidity : ≤90%
Wired Zone : 3
Wireless Zone: 16

Basic component:
- Security Alarm system (control unit) 1 pc.
- Wireless PIR detector 1 pc.
- Wireless door (gap) sensor 1 pc.
- Remote controller 2 pcs.
- Antenna 1pc.
- Mini wired siren 110dB/0.3m 1 pc.
- Power adpater 1pc.
- User manual 1pc.