Bluetooth Headphones, Tesson W-K2 Stereo Wireless Earbuds with Mic. Smallest Cordless Hands-Free In-Ear Earphones Headsets with Portable Charger & Noise Reduction for ISO and Andriod;

Smart Multipoint Support

You can connect with two devices at once to enable smart switching in seconds. This means while you're listening to music on your tablet and you get a call on your phone, you can answer the call without having to pair a new device.
How to Pairing?(Dual Headphone)

1.Select any one of the main headphone,the other for the sub-headphone (interchangeable)
2.Main headphone press 1-2 seconds,the boot(slow flashing blue light),press 2 times quickly the button to enter the main pair of headphones like(read and blue lights flash alternately)
3.Auxiliary headset Press 1-2 seconds.the boot(slow flashing blue light),press the button once assisted ear,primary and secondary headset automatically paired(primary headset red and blue lights flash alternately to disappear,with the secondary headset with flashing blue lights)
4.Master headset press 1-4 seconds to enter the mobile phone and headset pairing status(red and blue lights flash alternately)
5.Open the phone's Bluetooth find Bluetooth devices,select K2,the main headset becomes slow flashing blue lights,the connection is successful English voice switching:in alternating red and blue lights flashing,fast press button twice to complete the handover
How to pair with 2 Bluttooth devices at a time?

1.Pairing and connect with A smart phone.
2.Turn off smart phone Bluetooth function.
3.Pairing and connect with B Smart phone.
4.Turn on A smart phone Bluetooth function.
5.Reconnect the A smart phone or manual to click to make sure reconnect (pls make sure the smart phone have reconnect function)
6.Already connect A and B smart phone at a time.