STI-3301 Wireless Doorbell Chime Transmitter

The STI-3301 wireless chime transmitter has an operating range of up to 500 feet to its receiver. That covers a back gate, a garage door, a loading entrance, or a rear service door well away from the office where the chime sits, without running any wire.

The push button on the STI-3301 transmitter is water-resistant, so it can go on an exterior door, a gate, or a garage entry. It is the transmit side only; the chime receiver stays indoors.

The STI-3301 is the transmitter half only, the push button that sends the signal. You need a receiver from the Musical Wireless Chime Series for it to sound. Buy it as an add-on when you already have the chime and want a second or third entrance calling to it.

Ten selectable chimes transmit from the STI-3301 to the receiver, so each transmitter can be set to a different tone. Put one on the front entrance and one on the rear dock, give them different chimes, and staff know which door to go to without a camera. This is the usual reason a property manager or facility buyer adds transmitters rather than a second full system.

The chime output runs 64 dB to 88 dB measured at 1 foot. At the top of that range it carries in a small shop or an office suite. In a running warehouse with equipment noise, plan on a receiver close to where people actually stand rather than one unit for the whole building.

Yes. The STI-3301 is sold as a single-model add-on transmitter for the Musical Wireless Chime Series, which is how you cover back doors, gates, and garage doors off one receiver. Each added button gets its own chime selection from the ten available so the tone tells you the location.

No wiring. The STI-3301 is a wireless push button that transmits to the chime receiver, so there is no low-voltage run, no transformer, and no drilling through the jamb for cable. That is what makes it workable on a gate or a detached garage where pulling wire is the expensive part of the job.

The published figure, 64 dB to 88 dB, is measured at 1 foot, and sound falls off with distance, so what you hear across a room is lower than the number on the spec. STI publishes the decibel ratings per chime in the installation sheets. If you are specifying for a noisy space, site the receiver near the people who need to hear it rather than reading the 88 dB as a room-wide figure.