Product Details:

Do you love singing? Then this is the perfect product for you! 
No more messy cables with this super convenient wireless karaoke microphone duet pack.
Jam out with a friend 
Features a long wireless reception range of 50-100 meters 
Great for parties, performances, or meetings when you need your voice heard 

Specifications: 

• Frequency offset: ± 11kHz
  
• Frequency response: 80Hz-15kHz
• Frequency stability: ± 0.005%
• Signal to noise ratio: > 60dB
• Distortion: 0.5% (1kHz)
• Number of channels: two channels
• Sensitivity: -70dB M
• Operation distance: 50-100 meters (open area)
• Receiver power supply: DC 12V / 320mA
• Transmit power: 20mW
• Frequency range: 200MHz-270MHz
• Output: Automatic selection between independent and hybrid
• Package weight: 974g
• Frequency stability: ± 0.005%
• Carrier output power: ? 30mW
• Stray radiation suppression: > 40dB
• Modulation: VHF
• Maximum modulation: ± 75KHz
• Pickup method: Moving coil)
• Pre-emphasis: 50?S
• Power supply: 9V Battery (NOT included)
• Power consumption: <30mA

What's Included: 

• 1 x Receiver 
• 2 x Wireless Microphones 
• 1 x Audio Cable 
• 1 x Power Adapter 
• 1 x User Manual