The 900MHz Wireless Headphone kit includes a nice pair of Headphones, a base station, a power cord adaptor and a Fiber Optic Cable (SPDIF). The unit uses a rechargeable battery that has a decent life span, I have played for up to 3 hours without loss of audio. Manufacturer documents say 4 hours on a full charge. It does not appear to add much weight (the headphones are more substantial than my previous ones, but they are also larger).