Panasonic WX-ST400 Lavalier Microphone with Wireless Bodypack
The WX-ST400 pairs a cardioid electret condenser lavalier with a wireless bodypack for Panasonic's SR200P digital wireless system. It suits instructors and presenters who need to move hands-free, clipping to a belt or resting on a podium while the filtered, flat response keeps speech clear. The bodypack weighs just 0.21 lbs with a battery installed.
Pairing is automatic over DECT 1.9 GHz, so the pack assigns its own channel to a WX-SR202 or WX-SR204 receiver with no frequency coordination. A single AA battery, alkaline or rechargeable Ni-MH, powers it. The lavalier connects on a 2.5mm mic input, and a separate 3.5mm line input lets the pack transmit program audio from a laptop. It drops into the WX-SZ200 contactless charger for storage.
| Element | Electret condenser |
|---|---|
| Polar Pattern | Cardioid |
| Frequency Response | 100 Hz to 15 kHz |
| Microphone Input | 2.5mm jack |
| Line Input | 3.5mm jack (monaural mixing) |
| Wireless Frequency | 1920 MHz to 1930 MHz |
| Battery | 1 x AA (Ni-MH rechargeable or alkaline) |
| Battery Life | Ni-MH approx. 8 hours / alkaline approx. 6 hours |
| Bodypack Dimensions | 60 x 97 x 20 mm |
| Bodypack Weight | 0.21 lbs (95 g) with battery |










