Selling because I purchased another microphone. SONY Wireless Microphone ECM-AW4 Original Price: 25,300 yen This is a wireless microphone receiver set from Sony. Operation has been confirmed. Each unit requires one AAA battery. Please check the contents in the photos and make your decision. ◾️Description◾️ Records audio clearly from up to approximately 50m (*) away from the person filming. Can be connected to recording devices with a microphone input terminal, such as video cameras and IC recorders. ● By connecting the receiver and the recording device, you can have a conversation using the earphones connected to the recording device and the earphones connected to the microphone. ● Features a volume button to adjust the volume of the earphones. ● Can record the audio from the microphone (audio from the receiver cannot be recorded). ● Continuous talk time: Approximately 3 hours (with Sony alkaline batteries, at a temperature of 25 degrees Celsius) ■ Wireless Microphone Maximum external dimensions (approx.): Width 19mm x Height 66mm x Depth 30mm Weight (approx.): 19g