Excelvan K28 Dual Channel Transmitter Microphone 2017

Excelvan K28 Dual Channel Transmitter Microphone 2017 
Product link (buy here): https://goo.gl/cQduLK
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Main Features:
- Dual channel receiver, totally 25 frequency groups
- Use anti-jamming sound filter, fully eliminate the interference signal
- Low voltage design, battery low voltage can still work normally
- Support the audio compression, extension technique, reduce noise, dynamic range increase functions
- Used in ballroom, meeting room, teaching presentation, and home entertainment
- Microphone LCD screen display content: battery voltage, channel number
- Microphones are powered by 2 x AA battery ( not included )
Specification
Product Details
Brand: EXCELVAN 
Type: Wireless 
Connection: Wireless 
Bluetooth: Support 
Frequency Range: 50Hz - 18kHz 
Impedance: 13ohms 
Cable Length (cm): No 
Mainly Compatible with: Linux,Mac OS,Windows 2000,Windows 7,Windows 98,Windows 98SE,Windows ME,Windows Vista,Windows XP 
Product weight: 0.965 kg 
Package weight: 1.179 kg 
Package size (L x W x H): 27.50 x 12.00 x 16.50 cm / 10.83 x 4.72 x 6.5 inches 
Package Contents: 1 x Transmitter, 2 x Handheld Microphone, 2 x Audio Cable, 2 x Microphone Ring, 1 x USB Cable, 1 x 3.5mm Female to 2RCA Male Cable, 1 x English User Manual