Details 2.4GHz license-free operation Up to 4 full-duplex or 15 half-duplex beltpacks and/or all-in-one handsets per base station 7kHz wideband audio Single or dual-channel operation Light-weight, compact design, ergonomic design, weighing 7.4 oz Rugged and reliable Voice prompts Internal antenna Up to 20 hours of battery life Uses BAT41 Batteries and AC40 Battery Charger Item Code CZ-BP340 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)vtypical Transmit/Receive: Frequency-Hopping, Spread Spectrum (FHSS) Transmit Power: 100mw Burst Modulation Type: Gaussian Filtered FSK, TDMA Frequency Stability: 13ppm 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 Beltpack Antenna Type: Internal, Dual Diversity (beltpack) 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 Beltpack Headset Connector: Mini-DIN Beltpack Carrying Pouch: Santoprene Battery Life Latched: Up to 14 Hours PTT: Up to 20 Hours Dimensions 3.4 x 2.6 x 1.5in (WxHxD) (86 x 66 x 38mm) Weight 7.4oz (0.21kg) with Battery & Pouch