Portable Bluetooth Speaker with USB、 Micro SD、 AUX & TF card slot. Excellent audio quality with rich expanded bass. Works up to 10m range for 4 hours. Compatible across all electronic devices.

Highlights:
- Supports phone/latop/tablet pc
- Supports TF card(Mini, micro card)
- Modular 'Buddy- Jack Design: connect a row of mini speakers to get a jaw-dropping audio performance
- Expanded BxS (Bass Xpansion system) drives a fuller, richer low-end response
- New larger 45mm driver delivers precise highs for superb sound


Specifications:
- Model: BT-4781
- Support A2DP,AVRCP,Headset, handsfree profile
- Work range: Up to 10m
- Working time: 4 hours
- Colour: Black、 Blue、 Silver、 Red
- Dimension: 6.3cm (H) x 6.3cm (L) x 6.3cm (B)
- Weight: 230g

Speaker:
- Size: 45mm
- Loud Speaker Output: 3w
- Frequency response: 280hz-16KHz
- Signal to noise: > 95dB
- Distortion: <  0.5%

Battery
Voltage/Capacity: 500mAh
Charging voltage: 5V+- 0.5V
Charge time: 2 hours