Model Number: BK-311 Key Specifications/Special Features: Specifications：*Item Number：311*Bluetooth Version：2.1+EDR*Bluetooth Profile (such as A2DP, HSP, etc）：A2DP*Branding of Chipset：BK*Speaker Specifications(W & Ω)：4 Ω,3W*Frequency Response (Hz / KHz)：80Hz -20KHz*Sensitivity (dB)：>80 dB*Distortion degree of：>1%*NFC：No*TF card / SD card play features ：YES*Voice Guidance Features：YES*Microphone：YES*Handfree Features：YES*Any other Function & Features：1）colorful silicone covering 2）weave strapaudio cable round the bottom
*Battery Type：Rechargeable Li-battery
*Capacity,300mAh
*Voltage：3.7v
*Working time：3 hours
*Charging Port Type：micro usb
*Materials：ABS,metal
*Availablr color for selection：any color
*Product dimension (mm / cm)：Φ80*H52mm
*Weight (g / kg) ：155.5g
*Certification (such as CE, ROHS, BQB, EMC, LVD etc)：BQB(only bluetooth moudle)
*Production Lead Time：Deposit confirmed after 25 working days
*Warranty：HeuiXint will supply 0.3% free spare parts.

Package includes：
1*311 Bluetooth Speaker
1*Usb charging cable
1*Audio cable
1*User Manual

Our Advantage:
*Professional OEM Bluetooth Speaker Manufatures of 12 years
*Strict quality control and has a 22 person professional quality team.
*First-class service，from pre-sales advice to after sales care our team is always here to give quick
responses and professinal solutions.