Hornit dB140 V3 Bike Horn — 140dB Ultra-Compact Weatherproof Horn with Dual Tones

Hornit dB140 V3 is an ultra‑compact, weatherproof bike horn that delivers a 140dB piercing alert plus a secondary 121dB horn tone to help you be heard on roads, trails, and busy paths.

The dB140 V3 from Hornit is designed to give cyclists a reliable, high‑output audible warning without bulk. Combining two distinct sound modes, secure handlebar mounts for multiple bar sizes, and a lightweight, weatherproof housing, it offers a straightforward way to improve visibility and conversational calm on every ride. The unit runs on two AAA batteries (included) and weighs just 3.6 ounces with mount and trigger attached.

How loud is the Hornit dB140 and when should I use each tone?

The horn produces a maximum 140dB high‑pitched duo tone meant to cut through traffic noise, and a secondary 121dB car‑style tone for closer‑range alerts on trails or in parks. Use the 140dB piercing mode to make drivers and distracted pedestrians aware of your presence; use the 121dB horn mode when a less aggressive but still clear warning is preferable.

• 140dB piercing mode for long‑range, high‑noise situations.
• 121dB horn mode for short‑range, on‑trail warnings.
• Two distinct tonal profiles to suit road and leisure riding.

Will the dB140 fit my handlebars and how easy is installation?

Hornit includes two handlebar mounts so the horn fits most bicycles: a multi‑spacer clamp for 22–26mm bars and a dedicated clamp for 31.8mm road bars. Installation is tool‑minimal and quick, with a trigger positioned for natural thumb access so you can sound the horn without changing your grip.

• Includes mounts for 22–26mm and 31.8mm diameters.
• Four spacers provided for precise clamping on smaller bars.
• Trigger designed for one‑hand operation and secure placement.

How durable is the horn and what kind of battery life can I expect?

The dB140 V3 is engineered to be fully weatherproof and compact, making it suitable for year‑round use in rain or shine. It ships with two AAA batteries and averages up to 12 months of typical use (defined as six one‑second blasts per day), keeping maintenance infrequent and predictable.

• Fully weatherproof construction for wet conditions.
• Includes 2 x AAA batteries; long standby and usage life.
• Total assembled weight about 3.6 ounces for minimal added bulk.

How will the Hornit dB140 change my riding experience?

By providing a loud, unmistakable audio signal you can reduce the need to shout and lower the number of sudden stops caused by surprises. The horn’s compact footprint and ergonomic trigger mean you keep control while communicating your presence, helping rides feel smoother and more predictable.

• Reduces stressful interactions by clearly signaling presence.
• Compact, low‑weight design preserves bike handling and aerodynamics.
• Two modes let you tailor alerts to traffic or leisure environments.

Who is this for: The Hornit dB140 V3 is aimed at commuters, urban cyclists, road riders and off‑road users who want a powerful, compact audible alert. It suits anyone looking for a lightweight, weatherproof horn that mounts securely to a variety of bars and delivers both far‑reaching and short‑range tones without bulky hardware or frequent battery swaps.