Ultralite UL4-22 Kit HD - Eartec

Designed to facilitate wireless coordination and communication, the UL4D UltraLITE from Eartec is a 4-person dual-eared headset system suitable for use on film sets, theater sets, and more. Each headset weighs only 4 oz, can receive audio at a speed of 1.152 Mbps, and can last six hours before requiring a recharge, which you can accomplish via the included charging station. Its microphone can swivel 270°. When you're done, simply pack it all up in the case. These headsets will receive audio at ranges of over 1000'.

Headset
Standard Digital Enhanced Cordless Telecommunications (DECT 6.0)
Frequency 1920 to 1930 MHz
Channel Bandwidth 1.728 GHz
Modulation Type GFSK
Transmission Speed 1.152 Mbps (Baud rate)
Duplex Operation Time Division Duplex (TDD)
Speech Coding ADPCM / 32-bit/s
RF RF Accessing: Time Division Multiple Access (TDMA)
Range 1312.3' / 400 m in open space
Power Supply Rechargeable Lithium battery, 3.7 V, 800 mAh, 2.0 Wh
Charger AC adapter
Input: 110-40 VAC
Charge Time 3 hours
Operation Time 6 hours
Operating Temperature 32 to 50°F / 0 to 10°C
Storage Temperature 14 to 140°F / -10 to 60°C
Weight 4 oz / 113.4 g (per headset)
Packaging Info
Package Weight 4.6 lb
Box Dimensions (LxWxH) 12.2 x 9.4 x 7.1"