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How To Pairï¼Initial Setup and Usage Notesï¼ Press and hold the two MFB buttons for 3 seconds at the same time. The blue indicator light flashes. Wait for 6-10 seconds. The headset will sync successfully. The headset will beep. Find WH-300 on the phone Bluetooth and connect to enjoy music instantly. If you need a single headset to use, press and hold the headset MFB button to the indicator red and blue flashing alternately. Open the phone Bluetooth to find WH-300, connect to enjoy music instantly TROUBLESHOOTING If you are unable to connect your earbuds and mobile phone, please try the following: Ensure that your earbuds are fully charged and powered on. Ensure that the earbuds are paired with your media device. Ensure that your media device’s Bluetooth feature is activated. Noise reduction function: acoustic noise reduction of ear canal Bluetooth version: V4.1 Support Protocol: Bluetooth Protocol: HFP/A2DP/HSP/AVRCP Transmission range: 10 meters Chip: Airoha 1511J Applicable models: more than 95% of mobile phones in the market, tablet Headphone charging time: about 1h Headphone life: about ‘= 2h Talk time: about>=2 Standby time: about 40 hours (Bluetooth connection does not play music) Frequency response: 40HZ-16KHZ Speaker impedance: 16 ohms Speaker power: 1MW S/N: 95DB(A) THD: 0.2% Speaker technology: high-frequency dynamic ring flared ear cap polyphony technology, N45 high-performance neodymium iron boron magnet Satisfactory service: December Product Product Warranty 24-hour email support One month free return