MT0573Y Features Suitable for mobile phones， Laptops and Tablet PCs with Bluetooth function Modular buddy-jack design: connect a row of mini speakers to get 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 Fashionable appearance works with stereo sound effect Built-in microphone， supports hands-free calling Supports Bluetooth technology for music play and clear hands-free conversation Can play music from an external TF card Compact size for ease of carrying Makes a perfect gift for your friends General Specs Brand & Model A8 Type Bluetooth speaker Bluetooth Version V3.0 Frequency Response 16Hz-280Hz Working Time 5 hours Speaker Φ40mm Battery Charging Voltage 5V±0.5V Battery Capacity 520mAh Transmission Range Up to 10m Loudspeaker Output 3W Signal-to-Noise ≥95dB Distortion ≤0.5% Battery Charge Time 2 hours Package Details Weight: 174.41 g Size: 20*10*4.5 cm