Williams AV DLT 400 Digi-Wave 400 Digital Wireless Listening System Transceiver, Guided Tours, Language Interpretation, Intercom, Hearing Assistance, Up to 900 ft (274 m) Range

Key Features
- Guided Tours – with one or more tour guides (2-way), with audience participation (2-way), or without audience participation (1-way)
- Language Interpretation – one or more interpreted languages transmitted to audience (1-way)
- Intercom – with up to six people able to speak simultaneously, and even more listening
- Hearing Assistance – featuring boosted audio for improved comprehension
- Has an internal rechargeable battery and includes the charging pack DW ACC PAC4

Specifications
- Battery type: Lithium Polymer with smart charge built into transceiver; 1800 mAH
- Battery life: Up to 16 hrs talk time
- Power Save: Auto Sleep Mode after 5 minutes of no RF signal from compatible devices
- Charge time: 5 hrs. approx.
- System Voltages: OLED 14VDC; RF 5VDC; Logic 3.3 VDC
- Operating frequencies: 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS
- Audio Frequency response (-3dB Level): Intercom Mode: 100 – 7,200Hz, Other Modes: 100 – 11,500Hz
- SNR: 73 dB
- THD: 0.1 % (Default Volume, 1kHz)
- Microphone input: Internal microphone and 3.5 mm phone jack (sleeve) with electret microphone bias, adjustable gain with 63dB range.
- Line Input: USB-C, Adjustable level
- Headphone Output: 3.5 mm TRRS headphone jack; 25 mW, R 32 ohms
- Audio Output: Headphone: Max SSPL 90 111.8dB (EAR 013), 116.8dB (EAR 041)
- Line: USB-C, Adjustable level
- Range: Up to 900 ft (274 m)
- Modulation: FSK
- RF Output: 19 dBm Typical
- Security: 87 bit encryption, 87+128 bit Encryption, Encrpytion PIN, Lock for settings
- Indicators: OLED
- Charging Connectors: USB-C
- Operating Tempurature Range: 14º to 113ºF
- Dimensions: 4.22"W x 2.60"H x 0.50"D
- Weight: 3.3 oz