All Products Auditory Warning Self-Adjusting Back-Up Alarms

Self-Adjusting Back-Up Alarms

Whelen self-adjusting black backup alarm with two side bolts.

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BU107HD, BU112HD, BU82107, or BU87112 (Same Housing)

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BU107HL, BU112HL, BU82107L, or BU87112L (Same Housing)

front view image of black Whelen Self-Adjusting Back-Up Alarm

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BU87LD, BU97LD, BU102LD, BU7797, or BU77102 (Same Housing)

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BU87LL, BU97LL, BU102LL, BU7797L, or BU77102L (Same Housing)

Whelen self-adjusting metal backup alarm switch with long adjustment screw.

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BUSW1

Auditory Warning

Self-Adjusting Back-Up Alarms

Our Self-Adjusting Back-Up Alarm delivers unparalleled adaptability, automatically adjusting its output from 87dB to 112dB based on ambient noise levels. Designed with universal mounting options and stud or blunt cut wire connections, it’s easy to install and highly versatile. Compatible with 12-24 VDC systems, this alarm reduces noise pollution while maintaining a clear and effective warning in dynamic work environments.

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Features

Smart Adjustments: Automatically adapts to changing noise levels for optimal safety
Easy Integration: Simple to install with options that fit a wide range of vehicles
Noise Reduction: Balances safety and environmental considerations by minimizing excess noise

Specs
Dimensions
Models
Documentation

Specifications

Please note: Not all specifications will apply to every model. Consult your sales representative to confirm specs.

Tones	Self-Adjusting back-up warning tone
Control	Controlled by connection to vehicle’s back-up lights or back-up switch
Customization	Self-Adjusting: Automatically adjust to the ambient noise around every half-second, reducing noise pollution Wire Option: Choice between blunt cut wires or stud connection Decibel Options: 77db - 97dB 77db - 102dB 82db - 107dB 87db - 112dB
Construction	Housing: Glass filled nylon Fully Encapsulated: Moisture, vibration, and corrosion resistance
Mounting	Universal Mount: Horizontal or Vertical
Included Cables & Hardware	Blunt cut wires or stud connection
Certifications	SAE Class F
Warranty	2-year Please see our warranty statement for more information here.
Voltage	BU7797, BU77102, BU87112, BU7797L, BU77102L, BU87112L: 12-24 VDC BU82107, BU82107L: 12-48 VDC
Size	BU7797, BU77102, BU7797L, BU77102L: 4.02” (10.21cm) W x 2.74” (6.96cm) H x 1.65” (4.19cm) D BU82107, BU82107L: 5.20” (13.20cm) W x 3.20” (8.12cm) H x 2.88” (7.31cm) D BU87112, BU87112L: 5.05” (12.83cm) W x 3.20” (8.12cm) H x 2.88” (7.31cm) D