Got this stuff from ebay years ago. It is simple to use. The earhook fits comfortably in my ear. The sound is crisp and clear. It tooks me 1 day before I have to recharge the battery.

Full Specs:
- Bluetooth V3 Handset
- Connect with Two Devices at the Same Time
- Easy Pairing Feature
- Noise Isolation
- 70mAh Recharge Battery
- Micro USB Charging Port
- Talking Time : up to 4.5 Hours
- Standby Time : up to 100 Hours
- Size : 52H x 17.8W x 6.4D (mm)
- Weight : 7g net