Using PCM1794 decoder chip, 5532DD three op-amp dual power supply boost circuit architecture, and with isolation to dry processing, so that the system noise to lower, this circuit scheme switching, unplugging power are no burst of sound, completely the impact of burst of sound on the speaker, to protect the speaker. The program sound quality is parent and full, low-frequency elastic, full midrange, high-frequency delicate, dynamic range, these are not only PCM1794 this 24-bit chip is given, more circuit architecture to determine the. Built-in super hidden antenna, stable and reliable performance, comparable to the traditional column antenna, Bluetooth chip using high-quality momentum solution, with fast connection stability and reliability and other advantages, connection stability and speed than solutions. Patented appearance, that is, fashionable and stable, let you love the overall CNC processing molding, the top visible parent window using hardened anti-flower PC material, the top PC skylight can be self-adhesive (shipping default not paste) to facilitate the need to change the amplifier friends. Rotary encoder to adjust the volume, the encoder to select the digital signal channel. Volume control features: M610 using the system volume control its purpose is to the analog volume, digital volume adjustment process generated by the audio signal loss and distortion, is a solution to improve fidelity, the number of segments of the volume control by the phone or computer system volume segment decision. Product size: 12CM x 12CM x 2.5CM Weight: 0.4KG Power supply: 5V2A (Type-C interface) Dynamic range: 110dB Output level: 1.8Vrms Output interface: , 3.5MM interface BT: Support Bluetooth protocol AAC, PC: Support for computer/cell phone SUB audio signal input Fixed 16bit 48K decoding, does not support exclusive, can play any audio files, including PCM and DSD files USB: su