1、Interface type: 5mm. Bluetooth version: Bluetooth Battery specification: 80mah rechargeable lithium battery. Features: support 2 in 1, support to connect earphones. mobile phones, speakers, cars. Features: Bluetooth receiver, Car Bluetooth receiver, AUTO Bluetooth. receiver, AUX Bluetooth receiver, audio adapter. 2、Basic functions: Telegraphic number: Support. Voice prompt: Support. Chinese‑english dual voice: Support. (Default English) 2 in 1: support. Pairing timeout shutdown: The pairing state lasts for 5 minutes before shutdown. Low power reminder: when the voltage is less than 2V, remind once every 5 seconds, 1V shutdown. 3、System status: Power on and off: Long press the power on button for 5 seconds. Volume up: press +. Volume down: short press ‑. 4、Music control: Play pause: Short press the power button. Previous song: ‑ Long press 2‑3 seconds. Next song: + long press 2‑3 seconds. 5、Telephone control: Answer the phone: Short press the power button when calling. Reject calls: Press the power button for the duration of the call. No redial: Double click the power button, then press the power button to cancel the redial. 6、Led light display: Power‑on pairing: red and blue lights flash alternately. Connection status: blue light flashing slowly. Low voltage: red light flashing. 7、Working current: State parameter (00V). Rated voltage 00V 40V. Paired state current 33 mA‑20.56 mA 47 mA‑203 mA. Standby current (Bluetooth connected) 0.43 mA‑8.31 mA 0.41 mA‑8.74 mA. Music current 19.04mA‑221mA. 285mA‑274mA. Call current 282mA‑205mA 219mA‑278mA. Charging current 100.0mA. 100.0mA. Shutdown current 4uA 1uA. 1x Bluetooth Adapter1x 3.5mm/0.1in Audio Head1x USB Cable1x Instruction Condition: 100% Brand NewItem Type: Bluetooth Audio ReceiverMaterial: ABSColour: BlackWeight: Approx. 25g/ 0.9ozBattery Type: Polymer Lithium BatteryBattery Capacity: 180MAHBluetooth Version: V 4.1Stand-by Time: about 250hCall Duration: about 10hBattery Status: Support for Android,for IOSFrequency: 2.4HzSupport Agreement: HEP1 / 6 / A2DP / AVRCPConnection Distance:15m/ 49.2ftMain Function: No Flashing Lights, to Telegraph Number, Intelligent Noise Reduction, Chinese and English Voice, Low Power Reminder