Good for sport use:
You can use the blades that fit your ears and they DO NOT MOVE around. If You want better sound, you can push them in all the way. If You want to break the sound block so you can hear cars and still have music on, You pull them out part way. Either way, they stay put. Pushed in all the way does produce some pounding with each footfall, but it's not a big deal.
The buttons are great; all on the right ear. The big, center one pauses the sound with one push, then turns it back on with another. The volume buttons are intuitive and easy to use while running. If I want to skip a song, I use the volume buttons and just hold it down for a second or two.

Product features:
1.Bluetooth V4.0+ EDR
2.Operating distance: 10 meters
3.Battery:80MAH
4.Talking time: 5 hours
5.Music playing time:4 hours
6.Standby time: 100 hours
7.Charging Time: about 1.5-2 hours

• *Wearing a Necklace
  Comfortable and snug fit make sure the headset stays put when you are out running, jogging or exercising.
  
• *Freedom to Enjoy
  Cut the cord and break away from wires with Bluetooth 4.1. You can enjoy excellent sound performance from this durable, lightweight and sweat-proof headset.
  
• *Great Conversation
  Passive Noise Cancellation technology filters out the surrounding noise and makes your sound loud and clear.
  
• *Smooth Performance
  Specially designed ceramic antenna improves signal strength and tolerates more interference, your music becomes smooth without noise or breaks.
  

*Wearing a Necklace
Comfortable and snug fit make sure the headset stays put when you are out running, jogging or exercising.
Shenzhen Hisonic Audio Products Co., Ltd.