Details 2.4GHz license-free operation Supports up to 4 full-duplex or 15 push-to-transmit shared users Portable, compact design Weather-proofed gaskets Power via 100-240V AC, 12V DC, 1.5V “AA” batteries or an optional rechargeable BAT850 battery Item Code CZ11383: 4-Up DX100 system without headsets (Last Time Buy) CZ11396: 4-Up DX100 system with WH200 headsets (Discontinued) CZ11433: 4-Up DX100 system with HS15 headsets (Last Time Buy) CZ12020: MB100 base station EU version (ETSI compatible) (Discontinued) Technical Specifications Antenna Type External, Dual Diversity, ½-Wave Dipole (Supplied) Power Requirements: Six 1.5V AA Batteries or Rechargeable BAT850 Battery; 12V DC Automotive Adapter or 100/240V AC Power Supply Size: 10.2 x 6.45 x 3.33in (25.91 x 16.38 x 8.46cm) Weight: 2.35lb (1.07kg) with Alkaline Batteries Front Panel Controls: Power Switch Register Beltpack Beltpack Unlatch Clear Registration Reset Button Front Panel Indicators: Beltpack Registration Status Display Power/Low BAT Indicator Beltpack Receive