Wireless TWS I12 Bluetooth Headphone with Charging Case M27 Bluetooth Headset (Assorted, True Wireless)

Steps to use I12 for the first time:1. Click the power switch on the charging case 2. Two i12 earphones are paired: 1) Open the charging case and remove both Earbuds at the same time, 2) then power on and pair automatically (IMPORTANT REMINDER: The condition to make the earplugs turn on automatically is to turn on the switch on the charging box), 3. Pair with the device: 1) turn on bluetooth on the device 2) search i12 and connect.Specs:1. Driver: 15mm 2. Impedance: 9 OHM 3. Bluetooth Version: Bluetooth 5.0 4. Output Power: 40mW; Battery capacity 35MAH, charging box is 300mh. 5. Bluetooth distance: 10 meters 6. Frequency response: 20-20000Hz 7. Operating voltage range: 3.0V-4.2V 8. Powerful noise reduction circuit (active noise reduction) 9. Charging time from 1 to 2 hours. 10. Talk time is about 2-3 hours (a pair of earphones are used together), music time about 2-3 hours (a pair of earphones are used together), the charging box can charge the earphones about 3-5 times.