Description
The Wheelock MT4-115-S is a 120 VAC multitone electronic horn delivering 99 dBA of penetrating audible output across eight nationally and internationally recognized alarm tones. Built for both surface and flush mounting, it installs cleanly indoors and outdoors without a separate back box. Two field-selectable sound output levels — HIGH and STANDARD — let installers match audible intensity to ambient noise conditions, and the Code-3 tone patterns are engineered to meet NFPA/ANSI temporal specifications.
Key Features
- 99 dBA (HI) sound output at 10 ft — superior penetration in high-ambient environments
- 8 field-selectable alarm tones: Horn, Bell, March Time Horn, Code 3 Horn, Code 3 Tone, Slow Whoop, Siren, Hi/Lo
- Code-3 patterns comply with NFPA/ANSI temporal specifications
- Selectable HI and STD dBA output levels
- Surface or flush mounting — no back box required
- Indoor and outdoor rated
- Gray housing
- 50 mA current draw at 120 VAC
- UL 464, UL 1971, cUL, CSFM, and FM listed
Specifications
| Specification | Value |
|---|---|
| Part Number | MT4-115-S |
| Voltage | 120 VAC |
| Current Draw | 50 mA @ 120 VAC |
| Sound Output @ 10 ft | 99 dBA (HI) |
| Alarm Tones | 8 selectable (Horn, Bell, March Time Horn, Code 3 Horn, Code 3 Tone, Slow Whoop, Siren, Hi/Lo) |
| Sound Levels | Selectable HI / STD dBA |
| Dimensions | 4.06″ × 4.06″ × 2.2″ |
| Mounting | Surface or flush; no back box required |
| Color | Gray |
| Application | Indoor / Outdoor |
| Certifications | UL 464, UL 1971, cUL, CSFM, FM |
| Manufacturer | Eaton (Wheelock) |