Features: brand new and high quality Adopt RCA/3.5mm Headphone port output ,convenient and efficient in use. Auto decode AC-3-/DTS (LPCM/for RAW) input signal without any action. Auto switch between optical and coaxial channel input. Build-in high performance RTOS operating system and audio decoder chip; support DTS/AC-3-. High compatibility: Support for network player, HDTV, Blu-ray DVD, DVD, for PS3, 360, DM500S, DM800HD, etc. Input:1 SPDIF Optical, 1 Coaxial. Output:L-OUT-R; 3.5mm Headphone Port. Small Size and Metal for case, Anti-interference. Super fast start for time about 3 seconds. Supports volume adjustment. Package Includes: 1 x Digital to Analog Bluetooth-compatible 2 in 1 receiver 1 x 3.5mm audio cable 1 x Optical Fiber cable 1 x Type c charging cable 1 x RCA audio cable 1 x User manual Specifications: Frequency Response Range: 10Hz-20kHz Signal-to-noise ratio: >110dB Distortion + Noise: <0.02% Product material: ABS plastic Effective distance: 20 meters Performance: HIFI level Support: A2DP/AVRCP Size: approx. 9x7x3cm/3.54x2.76x1.18in U disk supported formats: WAV/WMA/APE/FLAC/MP3, etc. Accessories: host, charging cable, audio cable, coaxial cable, optical fiber cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.