What's in the box:

bt-1 Wireless Bluetooth In-Ear Sports Earphone with Mic (Green)

Wireless Stereo BT Headphone is characterized by Advanced BT 4.1 technology, built-in high-grade Microphone & Speaker, hands-free function and lightweight design, designed for sports enthusiasts.

Features:
Wireless BT 4.1 ensures transmitting strong signal in high quality and high speed, delivering high-fidelity stereo music.
In-ear headset with ear-hook, brings you immersed music enjoyment and not easy to fall.
Built-in microphone enables hands-free calls to set free your hands when doing sports. It also supports multi-point technology.
Easily control playing / pausing, adjusting the volume, previous / next songs, answering / rejecting / ending calls.
Ergonomic design guarantees wearing stable and comfortable when exercising, running, climbing and other outdoor sports.

Specifications:
Model Number: bt-1
BT Version: 4.1
Support: HFP, A2DP, AVRCP
Working Distance Range: 10m
Frequency Response: 20-20KHz
Impedance: 32O
Sensitivity: 105dB
High-quality 3.7V / 60mAh Rechargeable Lithium Battery
Charge Time: about 1.5 hours
Standby Time: about 100 hours
Talking Time: 2-4 hours
Music Time: 2-4 hours (The music volume will affect the time)
Charge Port: Micro USB
Color: Black, Green, Blue, Red (Optional)
Cable Length: Approx. 67cm / 2.19ft
Headphone Weight: 16g / 0.56oz
Package Size: Approx. 12.5 * 11 * 3cm / 4.92 * 4.33 * 1.18in
Package Weight: 30g / 1.05oz

Package List:
1 * Headset
1 * Micro USB Charging Cable
1 * User Manual