Transmission distance: barrier-free 10 meters, intelligent one-to-two connection with two mobile phones at the same time Line length: unstretched 30, stretched 120cm Using Bluetooth 5.1 version, the compatibility, stability and response speed are the previous version The 2.3.5mm plug can connect audio devices such as cars and sound effects without Bluetooth through the AUX interface, making it Bluetooth capable The anti-current interference circuit design effectively isolates the "squeak" caused by the current, making the sound quality more pure 5.0.3-1.2 meters of spring wire, the wire is made of high-rebound TPE material, which can be stretched at will without deformation, anti-winding and not messy, easy to store and more convenient to use Support hands-free calling, release your hands to make driving . Built-in high-definition noise-cancelling microphone, clear and -free incoming calls Barrier-free straight line 10 meters transmission USB direct power supply, no need to worry about low power and battery life Gold-plated 3.5mm plug + enameled copper wire core, not afraid of oxidation, but also improve the sound quality Memory connection, after the first connection, boot can automatically pair and connect Product Name: M01 Bluetooth Audio Receiver Output interface: 3.5mm/Bluetooth version 5.1 Sensitivity -423 dB/ 90 dB Audio transmission mode AAC, /Bluetooth delay less than 200 ms +N less than 0.1%/support TF card up to 32G Frequency Response 20 HZ-20 KHZ Output power range 33 mW RL=16ohm Effective transmission distance less than equal 10 meters Bluetooth Indicator Blue LED Frequency range 2400-2483.5MHz Colour:silver Material:ABS Size: 40 x 2 x 1CM Package Contents: 1 x bluetooth receiver Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.