Main Features:- Bluetooth 4.0 technology for lower energy consumption but more stable connection and faster transmits speed， wireless operating distance is up to 10m
- Long playtime， fast recharge: Built-in 600mAh rechargeable Lithium-ion battery supplies 8hrs music time and it can be fully recharged for 3hrs
- Simple control panel: Easy access to hands-free talking / Volume up / Volume down / Fast forward ( skip ) / Backward / Pause / Play / Power buttons
- Diverse play mode: Can play music directly from TF card / AUX cable and Bluetooth devices， convenient to use
- Broad compatibility: Quick pairing through Bluetooth with any Bluetooth enables smart phones
- Built-in microphone let you can have a more clear and safer call with your families and friends
- Fashionable and high-end equipment， not only satisfies your own awesome music enjoyment need but also can be used as a creative present for friends Brands: THECOO
Model: BTD531K
Design: Mini，Portable
Compatible with: Mobile phone，PC，Tablet PC，TF/Micro SD Card
Supports: Bluetooth，Hands-free Calls，Loudspeaker，Microphone，TF Card Music Playing，Volume Control
Functions: Stereo
Connection: Wireless
Interface: 3.5mm Audio，Power Charge Port，TF Card Slot
Audio Source: Bluetooth Enabled Devices，Electronic Products with 3.5mm Plug，Electronic Products with USB port，TF/Micro SD Card Bluetooth version: V4.0
TF Card Extension: 32G to the Max.(Not Included)
Transmission Distance: W/O obstacles 10m
Driver unit: 45mm
Speaker Impedance: 4 ohm
Power Output: 3W
Standby time: 6 - 8hrs
Freq: 120Hz -18kHz
S/N: 75dB
Distortion: No more than 0.1pct Charging time: 3hrs
Lasting Time: 8hrs
Battery Capacity: 600mAh Package weight: 0.298 kg
Product size (L x W x H): 8.70 x 8.70 x 4.00 cm / 3.43 x 3.43 x 1.57 inches
Package size (L x W x H): 11.70 x 11.70 x 6.20 cm / 4.61 x 4.61 x 2.44 inches Package Contents: 1 x BTD531K Bluetooth Speaker， 1 x Manual in Chinese and English， 1 x Strap， 1 x USB Charging Cable， 1 x 3.5mm Audio Cable