The LA-455 tour guide headset from Listen Technologies features a built-in boom mic and dual, over-the-ear speakers that reduce external noise when used with the ListenTALK tour guide transceiver. Perfect for loud industrial environments where clear communication is essential. • Ideal for industrial plant tours and other high-noise environments • Dual, over-the-ear speakers provide increased noise isolation and improved clarity • Built-in boom mic for convenient two-way communication Audio: Microphone Element: Electret Microphone Polar Pattern: Unidirectional - Noise Cancelling Microphone Impedance: 1.5 k Ohms typical Microphone Sensitivity: -45 dBV/Pa @ 1 kHz Microphone Bandwidth: 250 Hz - 4 kHz Microphone Bias: 3 - 5 VDC Headphone Impedance: 32 ohms Headphone Bandwidth: 250 Hz - 4 kHz Noise Reduction Rating (NRR): 25.5 dB Physical Specification LA-455 tour guide headset: Colour: Black Cable Length: 99 cm (39 in.) Connector: Male 3.5 mm (TRRS), CTIA complaint Unit Weight: 454 g (16 oz.) Shipping Weight: 473 g (1.05 lbs.) One year warranty