The Digital 2-way audio converter is a Coaxial / Toslink audio converter, compact and convenient. It accepts SPDIF audio signal input through either Coaxial cable or Toslink cable,and passes the signal (as is) to both its coaxial and Toslink output ports. Features: Bi-directional Audio Converter: Supports two-way conversion: Coaxial to Toslink or Toslink to Coaxial. Plug and Play: Do not any software and drive. Its able to power this Optical to Coax Converter from Phone Adapter and a USB jack on the TV. Portable and Compact: It is quite compact and you an carry it to any places. Select one input from Coaxial or Toslink input ports, and send SPDIF audio signal to both Coaxial and Toslink output ports simultaneously. Specification: Input: 1 x Coaxial RCA Jack;1 x Toslink (optical fiber) Output: 1 x Coaxial RCA Jack ;1 x Toslink (optical fiber) Operating Temperature: 0°C ~ 40°C / 2°F ~ 104°F Storage Temperature: -20°C ~ 60°C / -4°F ~ 140°F Elative Humidity: 20~90% RH (Non-condensing) Item size: 4.8 * 4.8 * 1.9cm / 1.89 * 1.89 * 0.75in(L * W * H) Item weight: Approx.73g / 2.57oz Package size: 15.5 * 9 * 2.5cm / 6.10 * 3.54 * 0.98in(L * W * H) Package weight: 116g / 4.09oz Package list: 1 * Digital 2-way audio converter 1 * USB cable 1 * User manual