Wireless Bluetooth Headphones In-ear Stereo Music Headsets ( Item#: V3121B )

TWS-B1 Bluetooth Headphone is specially designed for you to listen music and answer calls while doing sports or driving, which features advanced True Wireless (TWS) Bluetooth 4.1 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:
[TWS Bluetooth Design]
Wireless dual ear stereo design, left and right ear channel separation. You can use B1's left and right ear headset solely (Single Track Mode), or used them in pairs (Stereo Mode). True Wireless (TWS) Bluetooth 4.1 ensures strong signal and fast transmission, and offers high-fidelity stereo music.
[Lightweight and Invisible]
The Bluetooth headset each with 5g lightweight, mini size and ultra-soft earcap provide you long time wearing comfort, and its ergonomic and skidproof earhook design guarantees 100% Stable when walking, running, climbing, driving, skating, cycling, fishing and other outdoor sports.
[Built-in High-quality Microphone]
High-sensitivity microphone reduces ambient noises and grasps the detail of voice, ideal for in-car calling or working use. Integrated Multi-point Technology (in Single Track Mode) enables you to switch between your business and personal phones.
[Long Battery Life with Charging Box]
Built-in 250mAh charging box enables headset charging for 4-5 times, recharge the cabin fully in 2 hours through Micro USB interface. The headphones will charge automatically in the charging box and stop automatically after fully charged. 45mAh Li-ion battery in both left and right headphones ensures 2 hours of music time, 3 hours of talk time, and standby time is up to 40 hours.
[Easy Operation & Pull In Design]
Simple operation with one button, easily control playing / pausing, answering / ending an incoming-call and redialing the last number. Pull In Design, convenient to carry and custody, avoids the loss of headphones.

Specifications:
Model: TWS-B1
Product Type: True Wireless (TWS) Bluetooth Stereo Headphone
Bluetooth Version: V4.1
Operation Range: Up to 10 meters (no obstacle)
Supports A2DP1.3, HFP1.6, AVRCP1.6, DI1.3 protocol
Frequency Range: 2400.0-2483.5MHz
Sensitivity: 118dB
Impedance: 24Ω
Charging Box: 250mAh
Battery capacity: 45mAh each
Music Playing Time: about 2 hours (The Music Volume will affect the time)
Talk Time: about 3 hours
Standby Time: about 40 hours
Charge Time: about 2 hours
Charge Port: Micro USB
Color: Black, Silver (Optional)
Headphone Size: φ2.0 * 2.6cm / φ0.78 * 1.02in
Headphone Weight: 5g / 0.17oz
Package size: 16.6 * 9.5 * 5.1cm / 6.53 * 3.74 * 2.00in
Package weight: 236g / 8.32oz

Package List:
1 * Headsets with Charging Box   
1 * USB Cable
2 * Pairs of Earcap
1 * Pair of Ear Hook
1 * Carrying Bag
1 * English / Chinese User Manual