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Audio-Technica ATW-1421 - System 20 PRO Dual Body-Pack System The Audio-Technica ATW-1421 is a professional digital wireless system delivering clear, reliable audio with 24-bit/48 kHz sound quality in the license-free 2.4 GHz range. Ideal for presentations, performances, and installations, it offers plug-and-play simplicity and scalable multi-channel operation. Key Features Operates in the 2.4 GHz ISM band with no TV interference 24-bit/48 kHz digital audio resolution for excellent fidelity Latency options: Standard mode (2.8 ms, 10 channels) and HD mode (6.7 ms, 20 channels) Range of up to 328 ft line-of-sight AES-128 encryption for secure audio transmission Expandable by linking up to five chassis for up to 20 simultaneous channels; each channel supports up to 4 transmitters Remote scanning, configuration, and monitoring via Audio-Technica Wireless Manager software Auto-lock feature to prevent accidental changes Each transmitter features all-day battery life, built-in charging terminals, and secure cW-style 4-pin connectors for lavalier or headset microphones (sold separately) Specifications Frequency Band: 2.4 GHz (ISM) Audio Resolution: Digital 24-bit/48 kHz Latency: Standard mode 2.8 ms (10 channels), HD mode 6.7 ms (20 channels) Range: Up to 328 ft line-of-sight Security: AES-128 encryption Expandability: Link up to five chassis for 20 simultaneous channels; each channel supports up to 4 transmitters Control: Audio-Technica Wireless Manager software What's in the Box ATW-R1440 Receiver: 4-channel, half-rack chassis, remote-mountable via Ethernet (up to 328 ft) Two ATW-T1401 Body-Pack Transmitters: Featuring cW-style locking 4-pin connectors, OLED displays, slide-to-mute switch, and NiMH battery compatibility Use Cases Perfect for professional speaking events, education, houses of worship, video production, and installations where reliable dual-channel wireless audio is essential.