Fangrui Product Features 1,Interface type: 3.5mm. Bluetooth version: Bluetooth 4.1. Battery specification: 80mah rechargeable lithium battery. Fangrui Product Features: support 2 in 1, support to connect earphones. mobile phones, speakers, cars. Fangrui Product 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 3.2V, remind once every 5 seconds, 3.1V shutdown. 3,System status: Power on and off: Long press the power on button for 5 seconds. Volume up: press and. Volume down: short press ‑. 4,Music control: Play pause: Short press the power button. Previous song: and 8209 Long press 2and 8209 3 seconds. Next song: and long press 2and 8209 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: Powerand 8209 on pairing: red and blue lights flash alternately. Connection status: blue light flashing slowly. Low voltage: red light flashing. 7,Working current: State parameter (4.00V). Rated voltage 4.00V 3.40V. Paired state current 4.33 mA‑20.56 mA 4.47 mA‑22.03 mA. Standby current (Bluetooth connected) 0.43 mA‑8.31 mA 0.41 mA‑8.74 mA. Music current 19.04mA‑23.21mA. 22.85mA‑23.74mA. Call current 23.82mA‑24.05mA 25.19mA‑25.78mA. Charging current 100.0mA. 100.0mA. Shutdown current 1.4uA 1.1uA. Specification Condition: 100 percent Brand New Item Type: Bluetooth Audio Receiver Material: ABS Colour: Black Weight: Approx. 25g or 0.9oz Battery Type: Polymer Lithium Battery Battery Capacity: 180MAH Bluetooth Version: V4.1 Stand-by Time: about 250h Call Duration: about 10h Battery Status: Support for Android,for IOS Frequency: 2.4Hz Support Agreement: HEP1 or 6 or A2DP or AVRCP Connection Distance:15m or 49.2ft Main Function: No Flashing Lights, to Telegraph Number, Intelligent Noise Reduction, Chinese and English Voice, Low Power Reminder Package List 1x Bluetooth Adapter1x 3.5mm or 0.1in Audio Head1x USB Cable1x Instruction Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store