SONY wireless microphone ECM-HW2, with receiver (R) and transmitter (T). Accessories include earphones and a cover for the transmitter. There are minor scuffs from a few uses, but the condition is very clean. I confirmed power by inserting AA batteries into the transmitter only, but I have not tested the operation of the transmitter and receiver by attaching them to a video camera. As this is a used item, please check the product condition in the images before considering your purchase. - Brand: SONY - Model: ECM-HW2 - Type: Wireless microphone - Power: Receiver 7.2V Transmitter 1.5V - Accessories: Earphones, cover for transmitter Thank you for viewing.