Panasonic WX-ST400 Bodypack DECT Wireless Transmitter with Cardioid Lavalier Mic (1.9 GHz)

The Panasonic WX-ST400 is a DECT wireless bodypack transmitter that ships with a cardioid electret condenser lavalier microphone. Operating in the 1.9 GHz spectrum, it delivers a stable signal that resists the congestion often found in traditional UHF bands, helping voices stay clear in classrooms, conference rooms, and training spaces.

Setup takes only moments. Power on the transmitter and it automatically pairs with Panasonic WX-SR series receivers, so instructors and presenters can focus on their session rather than frequency coordination. An internal antenna keeps the unit streamlined, while a single LED shows power and link status at a glance.

The cardioid lavalier microphone captures speech in a focused pattern that reduces ambient noise and feedback. Its 100 Hz to 15 kHz response range preserves natural vocal tone, making every word intelligible for in-room listeners and remote participants alike.

For sessions that run through the day, the transmitter draws power from one standard AA battery and provides roughly six to eight hours of operating time. Swapping batteries is quick and requires no tools, so a teacher can change power sources between classes without missing a beat.

A 3.5 mm input allows direct audio from a laptop, phone, or media player, letting presenters blend music or prerecorded material into the wireless feed without additional equipment. This flexibility makes the WX-ST400 a valuable tool for hybrid learning, corporate training videos, and live demonstrations.

Built with everyday use in mind, the bodypack has a durable housing that withstands frequent handling and travel between rooms. Educators, corporate trainers, and event coordinators will appreciate a solution that is easy to operate, simple to maintain, and ready for reliable voice reinforcement whenever it is needed.

Highlights:

• Cardioid lavalier microphone with a 100 Hz to 15 kHz frequency response captures clear speech and limits background noise
• DECT 1.9 GHz wireless transmission reduces interference found in crowded UHF bands
• Automatic pairing with Panasonic WX-SR receivers simplifies setup
• Single AA battery powers the system for approximately six to eight hours
• 3.5 mm input accepts external audio from devices such as laptops or mobile phones
• Internal antenna and single-LED indicators create a clean, easy-to-monitor design
• Electret condenser capsule preserves natural vocal detail for lectures and presentations