1. siren horn 3 tone (wail, yelp, horn) 2.OEM,ISO9001,CE ROHS 3.alone,Low battery , Small size ,high sensitivity,safe Mob: 0086-158383208771.hao to uselink to alarm host and siren horm,Pretty design and fine shape 2. Technological parameter1. Power:6-12v,DC12v2. Standby Current: ≤ 320MA3. Burglar alarm system Current: ≤ 150mA4. sound loudness: 110dB5.material"ABS plastic cabinet