3. They will automatically connect to your bluetooth device when you use again 

4. This wireless earbuds also can be single connection.

    ♦ True wireless stereo, left and right channel separation, HIFI sound.
    ♦ Both the left and right ears have a full Bluetooth headset function, which can beused alone or in pairs.
    ♦ Dual Mode Bluetooth 5.0, ultra low power consumption.
    ♦ Bluetooth transmission distance: 10 meters.
    ♦ Listening to the song time: about 5 hours for one ear and about 3-4 hours for both.
    ♦ Battery Capacity(Charging case): Internal 1500mAh rechargeable battery.
    ♦ Standby time: About 300 hours.
    ♦ support protocol:A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/DI1.3.
    ♦ Noise reduction technology:CVC6.0.
 
package include:  
1* Pair Of Q67 TWS Wireless Earbuds
1* Charging Case
1* Micro-USB Cable
1* User Manual
2* Ear Tips