1). Either the  ear hook or the ear pulg.

2). Support bluetooth headset,handfree profile

3) .Redial the last call ,Reject call.

4). Volume adjustable.

5). LED indicates connection.

6). Faster connecting, clear sound, anti-interference

7).On-line chat through Bluetooth wireless transmitter

Specification:

1) Bluetooth protocol: CSR BC4 version 2.0
2) Frequency: 2.4 GHz
3) Bluetooth range: 10meters.
4) Net weight: 12g
5) Power supply:DC5.1V/120Ma

6) Working volt: 3.7V
7)Battery:  rechargeable Li-Ion battery

   Talking time:up to  5 hours

   Standby time: up to 90 hours

   Charging time: about 2 hours.

8).Size: 41.2*18.9*22.9mm

9) Color: Black,white,transparent red.

Accessories:

1).Charger(optional)

2).USB charging line.

3).User guide.

4).Ear hook