UHF Dual-Frequency Wireless Microphones Set with 1 Receiver 2 Transmitter 2 Lavalier Mic 2 Headset Mic for Teaching Meeting Live Performance

Specifications:
Transmitter--
Frequency Range: UHF
Channel Number: 10 (conservative values) each time matching, ID code random change, within the frequency range set by the manufacturer
Oscillator Mode: DSP chip frequency lock
Frequency Stability:  10ppm
RF Power: 10dBm
Sound Frequency: 40~18000Hz
Distortion: 0.5%
Battery Specification: 1.5V x 2/ two AA Size alkaline batteries (batteries are not included)
Endurance: 4~8hours (depending on battery type and capacity)
Transmitter Size: 9.1  6.5  1.9cm / 3.58  2.56  0.75
Transmitter Weight: 69g / 2.43oz
Receiver--
Frequency Range: UHF
Channel Number: 10 (conservative values) each time matching, ID code random change, within the frequency range set by the manufacturer
Vibration Mode: DSP chip frequency lock
Rate Stability:  10ppm
Receiving Sensitivity: -95~ 71dBm
Sound Frequency: 40~18000Hz
Distortion: 0.5%
SNR:  90dB
Audio Output: 300mv(maximum)
Power Supply: built-in 500mAh rechargeable battery
Receiver Size: 12.3  3.4  2.4cm / 4.84  1.34  0.94in
Receiver Weight: 40.2g / 1.42oz
Package Size: 28.5  13.5  9.5cm/ 11.2  5.3  3.7in
Package Weight: 495g/ 17.5oz
Package List:
1  Receiver
2  Transmitter
2  Lavalier Microphone
2  Headset Microphone
1  Antenna
1  USB Cable
1  3.5mm Converter
1  User's Manual (English)