WH340 6/3/2019 Category: Products, DX Series Digital Wireless Systems, Wireless Headsets, Wireless, DX340ES Digital Wireless Systems, Wireless Headset, Headsets & Accessories, Headsets, DX Series All-In-One 2.4GHz frequency range Up to 4 full-duplex or 15 half-duplex all-in-one headsets per base station Hands-free communication Single-ear, light-weight design 7 kHz wideband audio Rugged and reliable Up to 12 hours of battery life Uses BAT50 Battery and AC50 Battery Charger