The Countryman B3W4FF05BAT is a miniature omnidirectional lavalier microphone designed for professional use with Audio-Technica wireless transmitter systems. This model features a Black capsule and is configured for "Standard Sensitivity," providing an ideal output level for a wide range of vocal sources and professional transmitters. It is pre-attached to a 5-foot cable that terminates in a proprietary Hirose 4-pin connector, which is the standard connector for Audio-Technica's professional wireless bodypacks, ensuring a secure and optimized fit for that ecosystem. The Hirose connector is known for its robust, locking design, providing a reliable interface suitable for demanding broadcast and live event use.

The B3's omnidirectional polar pattern provides consistent 360-degree pickup, which is forgiving of minor placement variations and ideal for situations where natural sound capture is desired. Its extremely small size allows for easy concealment on clothing. The standard sensitivity setting offers a versatile output that works seamlessly with Audio-Technica transmitters. This specific configuration, with its professional Hirose connector and standard sensitivity, makes the B3W4FF05BAT a trusted and tailored solution for audio engineers working within the Audio-Technica wireless ecosystem who demand high-quality, reliable voice capture for critical applications.