Details 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 Item Code CZ-WH340 Technical Specifications System Frequency Range: All (2400 – 2483.5MHz), Low (2401.92 to 2439.936MHz) or High Band (2443.392 to 2481.408MHz) Frequency Response: 200Hz to 7kHz Security: 64-Bit Encryption Temperature Range: -4 to131°F (-20 to 55°C) typical Transmit/Receive: Frequency-Hopping, Spread Spectrum (FHSS) Transmit Power: 100mw Burst Modulation Type: Gaussian Filtered FSK, TDMA Frequency Stability: 13 ppm Harmonics/Spurious: Exceeds FCC and ETSI Specifications Over Temperature RF Sensitivity: <-90dBm w 10-3 BER System Distortion: <2% Dynamic Range: -90dBm to –20dBm FCC Acceptance: Part 15 All-in-One Headset Antenna Type: Internal, Dual Diversity Transmission Modes: Continuous (Latched) or Push-to-Talk (PTT) Mic Input: Electret Headset Output: 160mw into 32W Controls (Default): Power-On/Off, Volume-Up/Down, IC-Talk, ISO-Relay Indicators: Power/Transmit/Low Battery LED & Voice Prompts Battery Life Latched: Up to 14 Hours PTT: Up to 20 Hours Weight 5.7oz (0.16kg) with Battery