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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.

ElementElectret condenser
Polar PatternCardioid
Frequency Response100 Hz to 15 kHz
Microphone Input2.5mm jack
Line Input3.5mm jack (monaural mixing)
Wireless Frequency1920 MHz to 1930 MHz
Battery1 x AA (Ni-MH rechargeable or alkaline)
Battery LifeNi-MH approx. 8 hours / alkaline approx. 6 hours
Bodypack Dimensions60 x 97 x 20 mm
Bodypack Weight0.21 lbs (95 g) with battery