Details Two-channel operation 2.4GHz frequency range Hands-free communications Up to 15 all-in-one headsets on a single system 7 kHz wide band audio Single-ear, light-weight design Rugged and reliable Up to 12 hours of battery life Item Code CZ-WH410 Technical Specifications Audio Channels: 2 audio channels Frequency Range: 2400MHz – 2483.5MHz Frequency Response: 200Hz – 7 kHz Antenna: Internal, horizontal/vertical diversity Headset Connector: 4-pin, mini-DIN Microphone: Electret Headset Output: 160mW into 32Ω System Distortion: <2% Controls: Power, Volume-Up, Volume-Down, A, B, ISO Indicators: Dual-color LED (red/green) Battery Requirements: 3.6V lithium-ion Battery Life: Up to 12 hours Antenna Internal Transmitter Type: Frequency Hopping, Spread Spectrum (FHSS) Transmit Power: 100mW burst Modes: Momentary or Latch Type: Gaussian filtered FSK, TDMA Frequency Stability: 13 ppm Harmonics/Spurious: Exceeds FCC and ETSI specifications Receiver Type: Frequency Hopping, Spread Spectrum (FHSS) RF Sensitivity: <-90dBm w 10-3 BER Frequency Stability: 13 ppm Distortion: <2% Environmental 32° to +122°F (0° to +50°C) Weight 3.5oz (0.10kg) including battery