This is our Rockville RWM1202VH VHF Wireless Dual HandHeld Microphone System w/ Mic Receiver. Includes transmitter with two handheld, high sensitivity, unidirectional, wireless cardioid microphones. Improved high-performance wireless handheld microphone capsule.

Features:

• Featuring a dual filter design to limit feedback and interference
• Ultra signal stability eliminates unwanted distortion
• Transmitter automatically links to receiver for ease of use
• Use two handheld mics at once
• Individual microphone volume controls
• Rugged metal housing
• Comfortable ergonomic composite microphone construction
• Low power consumption for longer battery life        

Specifications: 

• Operating Range: 100'-200'(indoor), 65'-165'(outdoor)
• Channel: Two Channel
• Frequency Range: 170MHz - 260MHz
• Frequency Response: 80MHz-12000MHz
• Frequency Width: 32Mhz
• Dynamic Range: 110dB
• Operating Temp: 14°F ? 122°F
• Oscillation Mode: Quartz Crystal
• Frequency Stability: ±0.005%
• Modulation Mode: VHF
• Frequency Response: 80Hz ? 8 KHz (±3 dB)
• Harmonic Radiation :
• S/N: 60dB
• RF Output Power: 10mW
• Power Voltage: AC110V/ 220V - 50/60Hz
• Mic Battery: 9V
• Receiver:
• Sensitivity: (S/N=30dB) >2mV
• De-Emphasis: 50µS
• Audio Output Impedance: 600O
• Audio Output Level.: 0-0.5V
• Power Supply: AC110V /220V 50/60Hz
• Current Consumption: =50mA
• Audio Out Connector: 1/4" unbalanced 
• Transmitter:
• Frequency Stability: ±0.005%
• RF Output Power: =30mW
• Modulation Mode: VHF
• Maximum Deviation Range: ±50KHz
• Microphone Mode: Fixed
• Pre-Emphasis: 50µS
• Power Supply: AA/1.5V×2
• Current Consumption: =35mA

Package includes:

• 2 x wireless handheld microphones
• 1 x  receiver unit
• 1 x User manual
• Batteries
• Power adapter