YELANGU YLG9929C MX4 Dual-Channel 100CH UHF Wireless Microphone System with Transmitter and Receiver for DSLR Cameras and Video Cameras(Black) Specifications 1. Frequency response: 30Hz-18KHz 2. Delay of sound transmission: 90 dB 6. Maximum frequency deviation: +-50 kHz 7. Mute level: 15 dBuV 8. Distortion: >0.9% 9. Number of channels: 100 10. Indicator: RF, IR 11. Audio output: level> 48 dBV 12. Reference distance: 60 meters (outdoor open area) 13. Audio output interface: 3.5 mm jack 14. Antenna: 14 wavelength spring antenna (adjustable angle) 15. Headphone output: level 15mW (16 ohm) 16. Power: 2.4V DC (2 AA rechargeable batteries) or 3.0 V DC (2 AA alkaline batteries), battery not included, 5.0 V DC (external USB mobile power supply) to charge the rechargeable batteries, current: 600mA 17. Battery life: Taking 2 AA rechargeable batteries 3200mAh as an example, Group A+B can be used for about 8 hours at the same time; Group AB can be used for about 12 hours when working alone. Packing List 1. Receiver x 1 2. Transmitter x 1 3. Manual x 1 4. 3.5 audio 3P male to 3.5 audio 3P elbow cable x 1 5. 3.5 audio 3P male microphone x 1 6. Three-core Canon male connector to 3.5 audio 3P male connector x 1 7. Boot type holder x 1 Features 1. Dual-channel UHF line receiving technology, supporting 2 transmitters to work. 2. Using secondary 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 a headphone interface, which can be connected to headphones to monitor the radio effect in real time. 6. The volume of monitoring and audio output can be adjusted independently, and has a memory function. 7. Adopt WNCRS acoustic environment noise reduction technology, which can suppress environmental noise and wind noise. 8. Integrate a h