Details Two Audio Channels 5GHz frequency range 7KHz wide band audio Lightweight cable-less operation Easy pairing using NFC LED indication of talk status Audio message prompts for level changes, talk paths, and battery status Up to 40 all-in-one headsets on a single system Replaceable rechargeable battery and charging system Fully charged battery lasts 8-12 hours depending on talk activity Item Code EQP-WH: EQUIP All-In-One Headset AC70: 4-way battery charger with power supply BAT70: EQUIP Rechargeable Battery PSU-00004: AC-70 power supply Technical Specifications Frequency Range Audio: 100 Hz to 7 kHz Wireless Main Radio: 5.180 – 5.8525GHz BLE Radio: 2.402 - 2.480GHz Power Voltage: 3.7V DC, powered from a rechargeable Lithium-ion battery Nominal Power with listening only: 0.314W Maximum Power with dedicated mode: 0.407W Environmental IP54 water and dust resistance Operating: 32º-125ºF (0º-50ºC) Storage: 32º-150ºF (0º-70ºC) Humidity: Between 20% and 90%, Non-Condensing Dimensions 5.2 x 5.2 x 2.1in (132.1 x 132.1 x 53.3mm) without boom 9.2 x 5.2 x 2.1in (234.4 x 132.1 x 53.3mm) with boom extended down Weight 3.67oz (104.04g) with battery included