... outstanding performance· 5 in 1: Wireless online chat, Wireless Headphone, Wired headphone, Wireless monitoring and FM radio · Wireless online chat provides ... Laptop, mp3, mp4 etc Specification· Transmitter powered by : 2 x AAA batteries or DC 4.5V (not included) ... 2 x AAA batteries (not include)Packing include : · Wireless Headset x 1 · Wireless Transmitter x 1· Audio Cable x 1· Y adaptor Cable x 1 ...