<p><b>Williams AV DWS INT 2 400 ALK Digi-Wave 400 Interpretation System for 1 Presenter and 10 Listeners; Includes: DLT 400 Transceiver, (10) DLR 400 ALK Receivers, MIC 144 Headset, (10) EAR 022 Earphones</b></p> <b>Key Features</b> <ul> <li>Includes: (1) DLT 400 Transceiver, (10) DLR 400 ALK Receivers, (1) MIC 144 Headset Microphone, (10) EAR 022 Surround Earphones, (10) BAT 010-2 AAA alkaline batteries, (1) CCS 056 DW 11 System Carry Case and (1) CCS 061 GR Grey Silicone Skin</li></ul></br> <b>SPECIFICATIONS</b> </br></br> <b>DLT 400 Transceiver:</b> <ul> <li>Operating frequencies: 2.4 GHz (ISM band); 2402 – 2476 MHz FHSS</li> <li>Audio Frequency response: Intercom Mode 100-7200Hz/Other Modes 100-11500Hz</li> <li>SNR: 73dB</li> <li>THD: 0.1 % (Default Volume, 1kHz)</li> <li>Microphone input: Internal microphone and 3.5 mm phone jack with electret microphone bias, adjustable gain with 63dB range</li> <li>Range: Up to 900ft (274m)</li> <li>Modulation: FSK</li> <li>RF Output: 19dBm Typical</li> <li>Security: 87 bit encryption (300 Series Compatiable), 87+128 bit Encryption, Encrpytion PIN, Lock for settings</li> <li>Operating Tempurature Range: 14º to 113ºF</li> <li>Battery life: Up to 16 hrs talk time</li> <li>Weight: 3.3 oz</li></ul></br> <b>DLR 400 ALK Receiver:</b> <ul> <li>Display: LCD shows status: Battery Level, RSSI, Group/Channel #</li> <li>Frequency Band: 2.4GHz (ISM band)</li> <li>Audio Frequency Response: Intercom Mode 100–7300Hz/Interpretation and other modes 100-11200Hz</li> <li>SNR: 74dB (A-weighted)</li> <li>THD: 0.1%</li> <li>Antenna: Internal</li> <li>Range: Up to 900ft (274m)</li> <li>Battery Type: 2x AAA Alkaline Batteries</li> <li>Weight: 1.7 oz.</li></ul></br> <b>EAR 022 Earphones:</b> <ul> <li>Plug: 3.5mm mono</li> <li>Driver Size: 23mm</li> <li>Nominal Impedance: 32Ω</li> <li>Freq. Response: 20-20kHz</li> <li>Max Power Input: 30mW</li> <li>Sensitivity: 118dB @ 1kHz</li> <li>Weight: 15g</li></ul>