Audio Technica ATW-901a/L Wireless Lavalier Microphone Mic 169.505 - 171.905 MHz

The Audio-Technica ATW-901a/L is a System 9 VHF wireless lavalier microphone built around the ATW-R900a receiver and a body-pack transmitter. It is made for lectures, panel discussions, video shoots, and classroom sound, where you want a wireless channel running in a few minutes without an RF coordination session.

The system runs on the VHF high band between 169.505 and 171.905 MHz with four user-switchable, frequency-coordinated channels. If one channel picks up noise, you switch to another on the receiver and transmitter and keep going. Operating range reaches 200' in typical conditions, with a frequency response of 80 Hz to 13 kHz tuned for speech clarity.

A lavalier microphone clips to a lapel, tie, or collar and stays out of the camera frame, which suits video shoots, panel discussions, and lectures. It connects to the body-pack transmitter through a four-pin locking connector that will not shake loose during movement.

The ATW-R900a is a single-channel receiver with a dipole antenna design that adds a ground element alongside the usual signal element for longer working distance. Front-panel volume control sets the level, and AF Peak, RF, and Power indicators show at a glance whether the transmitter is on, in range, and running clean. Balanced XLR and unbalanced 1/4" output jacks connect to mixers, powered speakers, camera inputs, and portable PA systems. The receiver housing is stackable, so two or three channels sit neatly on a podium shelf or equipment cart. a body-pack transmitter runs on two AA batteries for roughly 8 hours of alkaline runtime, enough for a full teaching day or a weekend of services.