Sennheiser RS 2000 Digital Wireless Headphone Contents: Headphones, Charging Base, AC Adapter, Box. Used Tested Working - In Good Condition. Features: Product Dimensions: 6.5 x 3.4 x 11.8 inches Item Weight: 1.4 pounds Shipping Weight: 1.9 pounds California residents: Click here for Proposition 65 warning Item model number: RS 2000 Crystal clear wireless transmission for freedom of movement (up to 150 ft.).Connectivity Technology: Wireless Easy to use volume and balance controls Connects to TV or any audio device using analog input Built in