Feature: 1. Dual channel UHF line receiving technology. 2. Using secondary for DSP receiving processor, strong anti‑image interference ability. 3. Professional circuit design, with LOW‑CUT function. 4. Provide Mono stereo output and Stereo mono output. 5. Equipped with headphone port, which can be connected to headphones to monitor the radio effect. 6. The volume of monitoring and audio output can be adjusted independently, with memory function. 7. Adopt acoustic environment noise reduction technology to suppress environmental noise and wind noise. 8. Integrated high‑performance audio expander to provide a wider audio real‑time dynamic response. 9. Provide 100 wireless channels, you can set multiple groups of channels to work at the same time. 10. Support Line in / MIC in input, Line in is linear input, MIC in is microphone input. 11. It is powered by AA batteries, which is convenient for long‑term use and direct battery replacement, which extends the shooting interview time.(not included battery) Specification: Condition: 100% brand newItem type: One for Two MicrophoneMaterial: ABSColor: blackWeight: Approx. 633g Frequency response: 30Hz-18KHz Maximum sound transmission delay: <0.15ms Microphone specifications: capacitive omnidirectional Signal to noise ratio: 90 db Maximum frequency deviation: ±50kHz Mute level: 15 db Distortion rate: <0.9% Number of channels: 100 Audio output level: -48db Transmission distance: about 60 meters (outdoor open area) Audio output interface: 3.5mm port Antenna: 1/4 wavelength spring antenna (adjustable angle) Headphone output level: 15mW (16 Ω) Receiving frequency range: 505MHz-598MHz Battery: 2 x AA batteries (not included). Package List: 2 x Transmitter 1 x Receiver 1 x Connection line 1 x Cold shoe base 1 x Instruction