with battery backup Waterproof, UV proof 120db 2 ways temper switch protection SIZE: 250X160X100MMHIGHLY RESISTANT ABS HOUSING, UV PREVENTIONINSIDE METAL COVER FOR DOUBLE PROTECTIONMAGNETIC DYNAMIC SOUNDERS WITH 120DB AT 1M, POSITIVE/NEGATIVE SIREN TRIGGERPOSITIVE/NEGATIVE FLASH TRIGGERBATTERY BACKUPLEN CORLORS IN RED, BLUE, ORANGE, WHITE2 WAY TAMPER SWITCH PROTECTION