This is very light weighted and portable to take it anywhere with you 50m effective distance Transmitter: 1 x 9V battery

Features:This is very light weighted and portable to take it anywhere with you50m effective distanceTransmitter: 1 x 9V battery Receiver: 2 x 1.5V batteriesFrequency: 165- 270MHzDimension: 95 x 63 x 22  mm (transmitter) 118 x 78 x 20 mm (receiver)Package included:1 x Wireless Transmitter1 x Wireless Receiver1 x Headset Microphone1 x Clip-on Microphone 1 x 6.35(P)/3.5(P) cable1 x Battery for Transmitter1 x Battery for Receiver

SH-600 Wireless Headset/Clip-on Microphone Transmitter & Receiver