Yixin A20plus digital interphone uses high-power speaker digital voice coding and decoding technology to improve communication reliability and integrity, and combines AI noise reduction technology to improve voice quality, so that it can still make clear calls even in noisy environment. Support dual-slot communication, IP68 dustproof and waterproof working temperature range -30 C to 60 C, extreme cold does not "lose voice".# Yixin A20plus Digital Explosion-proof Interphone# Yixin A20plus Digital Interphone# A20plus Digital Interphone# Yixin A20 Digital Interphone# Huaan Jiexun Interphone# Youlitong Interphone# Lisheng Interphone# Yixin Interphone# Explosion-proof Digital Interphone# Explosion-proof Public Network Interphone