1、HDMI input supports automatic switching function. LED status indicator makes the working status clear. 2、In the audio extraction state, digital audio (fiber and coaxial) output can support up to 192KHz audio sampling rate (LPCM0 format), and also support LPCM0, DOBLY-AC3, DTS audio format output. 3、Support power-off memory function. The device can record your last setting when power-off, and immediately display it after power-on, thus reducing unnecessary duplication. 4、Support PIP (Picture in Picture) function. Through the remote control, you can select the input channel according to the program you like. 5、To convert 3-ch HDMI signal to 1-ch HDMI signal output. Support 4K full HD signal input and output. 6、The function of extracting and embedding the audio signal can be realized by the control button on the machine or the remote control, thereby realizing multi-purpose use of one machine. 1 x HDMI 3x1 Audio Embedded Device1 x User Manual1 x Power Adapter1 x Remote Controller Item Type: Audio ExtractorDigital Audio Input Format: PCM 2.0/Dolby AC3/DTSDigital Audio Input Sampling Rate: 32KHz, 44.1KHZ, 48KHZ, 88.2KHZ, 96KHzInput and Output DDC Signal: 5Vp-p (TTL)Analog Audio Maximum Input/Output Voltage Range: 70Hz-16KHzMaximum Transmission Bandwidth: 300MHzMaximum Working Current: 500mABattery Type: cr2025Battery Capacity: 160mahMaterial: MetalGross Weight: Approx. 688gPackage Size: Approx. 24x16x6cm/ 9.4x 6.3x 2.4in