Behringer ULM300LAV 

• System: Analog/Digital:Digital                                        Brand: Behringer
• System: Frequency Range:2.4 GHz
• System: Operating Range:100 ft. Line-of-sight
• Microphone: Polar Pattern:Cardioid
• Microphone: Frequency Response:100Hz-15kHz
• Transmitter: Form Factor:Lavalier
• Transmitter: Dynamic Range:95dB (A-weighted)
• Transmitter: Battery Type:2 x AA
• Transmitter: Battery Life:Up to 4 hours
• Transmitter: Dimensions:1.29″ x 2.48″ x 3.26″
• Transmitter: Weight:0.17 lbs.
• Receiver: Antenna Type:Fixed
• Receiver: Type:Table Top
• Receiver: Outputs:1 x XLR, 1 x 1/4″
• Receiver: Power Source:5V DC power supply
• Receiver: Dimensions:1.6″ x 5.9″ x 4.6″
• Receiver: Weight:0.52 lbs.
• Manufacturer Part Number:000-BQZ02-00010