BOYA BY-WM8 Pro-K1 Dual-Channel 48CH UHF Wireless Microphone System with Transmitter and Receiver for DSLR Camera and Video Camera

Feature
1. Dual-Channel Wireless Receiver
2. Consists of One Transmitter and One Receiver
3. UHF transmission with 48UHF channels
4. Ideal for ENG/EFP, DSLR Video
5. Broadcast-Quality Sound
6. Operation range can reach up to 100m
7. Adjustable MONO and Stereo mode
8. Powered by 2 x AA batteries for both transmitter and receiver

Transmitter
1. RF output power: =< 10mW
2. Antenna:1/4 lambda wire antenna
3. Spurious emission: 250nW or less
4. Audio input connector: 3.5mm jack
5. Reference audio input level: -60 dBV (MIC input, 0 dB attenuation)
6. Reference deviation: +/- 5 kHz (-60 dBV, 1 kHz input)
7. Input frequency range: 20Hz-20KHz
8. Distortion: 0.5% or less
9. Power supply: Two AA size batteries (not included)
10. Operation time: About 6 hours
11. Dimensions: 208(H) x 67(W) x 29(L)mm
12. Weight: 80g without batteries

Receiver
1. Antenna:1/4 lambda wire antenna
2. Audio output connector: 3.5mm jack
3. Signal to noise ratio: 70 dB or more
4. Distortion: 0.5% or less
5. Headphone output level: 30mW (16 ohm)
6. Audio output level: -60 dBV
7. Power supply: Two AA size batteries (not included)
8. Operation time: About 4 hours
9. Dimensions: 208(H) x 67(W) x 29(L)mm
10. Weight: 90g without batteries

Lavalier Microphone
1. Transducer: Back electret condenser
2. Polar pattern: Omni-directional
3. Frequency range: 35Hz - 18 KHz
4. Signal / noise: 74dB SPL
5. Sensitivity: -30dB +/-3dB / 0dB=1V/Pa, 1 kHz
6. Connector: 3.5mm locking mini plug
7. Length: 1.2m