Tai Nghe Bluetooth 5.0 Không Dây Bf I7S Tws Có Mic

BF i7s TWS Earbuds True Wireless Bluetooth 5.0 Headphones Sport Headset In-ear Music Earphones Hands-free with MicDescription:
i7s BT Headphone is specially designed for you to listen music and answer calls while doing sports or driving, which
Features advanced True Wireless (TWS) BT 5.0 technology, built-in high-grade microphone and speaker, hands-free function and lightweight design. A great companion for your daily life, office time, driving or travel.  

Features:
Advanced BT Technology:
Wireless BT 5.0 technology ensures transmitting strong signal in high-quality & high speed and offering high-fidelity stereo music.
TWS Headphones Design:
Wireless dual ear design, left and right ear channel separation. You can use the left and right earphone solely, or used them in pairs.
Hands-free with Dual Mic:
BT5.0 chip supports noise reduction and enables to grasps the detail of voice. Built-in Mic on both earbuds delivers crystal clear talking sound.
Comfortable to Wear:
4g lightweight, mini size design provide you long time wearing comfort, and guarantees stability when running, climbing or doing other sports.
Strong Compatibility:
Compatible with almost all iOS and Android Smart Phone, Tablet PC and other BT-enabled audio devices.
Note: There are two types of headphone boot programs (after pulling out the charging cable, default boot and no default boot), which will be shipped randomly.

Specifications:
Model Number: i7s
BT Version: 5.0
Transmission Distance: 10m (no obstacle)
Frequency Response: 20Hz-20KHz
Sensitivity: 42dB
Impedance: 32Ω
Battery: Earphone: 2 * 40mAh
Charging Time: about 1.2 hours
Working Time: about 2 hours
Standby Time: about 100 hours
Color: Black, White (Optional)
Earphone Size: approx. 4.7 * 1.8 * 1.8cm / 1.85 * 0.70 * 0.70in
Item Weight: approx. 4g / 0.12oz
Package Size: approx. 8.0 * 7.0 * 2.0cm / 3.15 * 2.75 * 0.78in
Package Weight: approx. 20g / 0.71oz

Package List:
1 * Pair of Earphones
1 * Charging Cable
1 * User Manual (Chinese & Eng