Overview: Model: PSTN-502 Suitable for conference room within 30m 2 & microphone covers 3 meters range With deep echo cancellation Bidirectional noise suppression purifies voice signal from both parties Hyper-cardioid directional microphone plus AGC function With Hi-fi audio amplifier With rare-earth neodymium magnet speaker With sonic clear patented voice processing technology Compatible with PSTN analog network Power adapter: Input 220V~240V AC 50 Hz, Output 12V 200m A Network interface: RJ11 analog PBX or PSTNAudio band
Width: 300 to 3, 400 Hz Reverberation time: < 0.4s Noise degree: < 48d BA