Bolun WR-601 Microphone Transmitter Receiver Set with Mini Clip Microphone Description: Tansmitter Dimensions: (3.7 x 2.52 x 0.87)" / (9.4 x 6.4 x 2.2)cm (L x W x H) Receiver Dimensions: (2.76 x 1.77 x 0.63)" / (7 x 4.5 x 1.6)cm (L x W x H) Microphone Diameter: 0.47 in / 1.2cm Weight: 7.90oz / 224g Modulation: FM Frequency Response: 80 -12500Hz Output Impedance: 600 ohm Operating Voltage: 9V for Tansmitter / 1.5V for Receiver Effective Distance: 20M Features: Ideal for aerobics/dance/sports instructors Record audio on both left and right channels Elegant style miniature microphone is perfect for video use It is a handheld dynamic microphone, ideal for vocal and instrument Provide a perfect wireless solution for any presentation or performance application Package Includes: 1 x Wireless Microphone 1 x Transmitter 1 x Receiver