The device is a Yamaha HTR-5640 A/V receiver. It is a 6.1-channel receiver designed for home theater systems.

Features and Specifications

Channels: 6.1 surround sound.

Power: 90 watts per channel.

Audio Technologies: Supports Dolby Digital EX, DTS-ES Matrix 6.1, DTS-ES Discrete 6.1, Dolby Pro Logic II, DTS Neo:6, and Yamaha's CINEMA DSP technology. It also features "Silent Cinema" mode for virtual surround sound through stereo headphones.

Connectivity: Includes coaxial digital and optical digital inputs.

Other Features: Has a built-in AM/FM radio tuner with 40 presets and includes a sleep timer.

Dimensions: 17.13 inches (W) x 6.34 inches (H) x 15.4 inches (D).

Weight: 24.25 pounds

It has been tested and works.