(Optional) Active directional broadband antenna:
Frequency range: 470-960MHz
Gain: 3dB/12dB (with 2 adjustable levels built-in)
Interface: BNC
Impedance: 50Ω
Receiving Angle: 70°
Voltage: 9-12V

(Optional) Active omnidirectional antenna (black/white mounting box) :
Frequency range: 470-960MHz
Gain: 12dB
Interface: BNC
Impedance: 50Ω
Receiving Angle: 360°
Voltage: 9-12V

(Optional) Passive omnidirectional antenna + active relay amplifier
Frequency range: 470-960MHz
Gain: 0dB (Relay amplifier: 3/12dB adjustable)
Interface: BNC
Impedance: 50Ω
Receiving Angle: 360°
Relay amplifier voltage: 9-12V

Technical parameters:
Antenna input impedance: 50Ω
Antenna output impedance: 50Ω
Antenna input socket: BNC
Antenna output socket: TNC to BNC
Gain: Built-in 3dB/10dB adjustable
Bandwidth: 500MHz
Power supply: DC12-18V 3000Ma