Nightshift Reverse Alarm. 42-BATSQ97 Dual Tone, multiple Decibel choice, with Silent Function...

• Dual Tone = Squarker OR Beep Beep Tonal
• Factory setting = Squarker 
• Choice of Decibel {dB} settings 87~97`107 dB
• 12~80V
• IP67
• -30 ~ +60 Deg. Celcius
• Approval  CE, ECE, R10
• 102 W x 67 H x 36 D mm

Wiring Instructions:

1. Black:     Negative
2. Red:        Positive
3. Yellow:   3~5 sec to earth changes the tone
4. Grey:      Momentarily apply to {+} power to cycle through dB options
5. White:    Silent Function  {1} Constantly connect to earth, after 3 secs it will be silent. Disconnect, it again will be active.
                                               {2} Quickly apply to earth twice {Tap-Tap}, most likely via momentary switch it will become silent.                                                               Single tap again & it will become active.                                                                                                                                                               ( When power is again reapplied, such as starting the car, it will resume normal function)