Product Highlights: On-board Antenna, The Mission Distance Is About 50 Meters In Open Space, No External Antenna Is Required. If It Is Installed In A Metal Case To Avoid Signal Shielding, You Can Purchase An External Antenna For Installation And Reserve An Ipex Antenna Seat. There Is A 12s Output Interface, Which Can Be Connected To A Power Amplifier With L2s Input Function, And A Button Expansion Interface Is Left To Realize The Previous/next Song Switching, Pause/play, Volume Adjustment, And Strong Expandability.there Is A Type-c Usb Interface, Which Can Realize Pc Sound Card Connection, Or Usb Power Supply. Free Acrylic Shell And Fixed Magnetic Column, Magnetic Adsorption Fixed Installation, Convenient And Quick. Qcc5125+pcm5102a Lossless Mission, Lossless Decoding, No Loss, Perfectly Display The Dynamics And Details Of The Sound, High Frequency Without Glitches, Midrange Is Round, Low Frequency Is Powerful, Good Flexibility. Extremely High Parameter Performance: Dynamic 112db, Signal-to-noise Rati