3.5Mm jack wireless bluetooth receiver adapter(Red)The product is shipped based on the color or size of the main image of the product page.Colour:RedTransform any audio system in your household or car to a bluetooth capable device instantly.Interface: 3.5mmWireless Type: bluetoothPairing timeout shutdown: shutdown after 5 minutes of pairing statusThis kind of bluetooth noise-reducing answering device, supports any key to answer calls, connects effectively with the smartphone, automatically matches the connection program, and maintains the connection state when charging. - sound insulation, high definition call: identify sound frequency through intelligent control chip, and generate reverse signal to filter out external noises (noise and wind) within the range of non-human voice frequency. High definition calls in any noisy environment.System status:Power off: MFB long press for 3 secondsVolume up: short press VOL+Volume reduction: press VOL-Switching languages: double-click and hold MFB in the pairing state (red and blue lights flashing)Music control:Play pause: press MFBLast song: VOL- press for 2 secondsNext song: VOL+ 2 secondsTelephone control:Answer the phone: press MFB when callingReject the call: the duration of the call is MFBUnsigned redial: double-click the MFB key, then press MFB to cancel the dialingLed display:Power-on pairing: red and blue lights flashing alternatelyConnection status: blue light flashes slowly (5 seconds 1 time)Low voltage: red light flashing (0.5 SEC 1)Working current:Status parameter (4.00v) (3.40v)Rated operating voltage 4.00V 3.40VMatching state current 4.33 ma-20.56 mA 4.47 ma-22.03 mAStandby current (bluetooth connected) 0.43 ma-8.31 mA 0.41 ma-8.74 mAPlay music current 19.04 ma-23.21 mA 22.85 ma-23.74 mAThe call current is 23.82 ma-24.05 mA 25.19 ma-25.78 mACharging current 100.0mA. 100.0mAPower off current 1.4uA 1.1uA