Model Number: WY-079-3 Brand Name: WANYI Key Specifications/Special Features: 1. Support phone/laptop/tablet PC support TF card (mini micro card)2. Modular 'buddy-jack' design: connect a row of mini speakers to get jaw-dropping audio performance3. Expanded BXS (bass expansion system) drives a fuller, richer low-end response4. New, longer 68mm driver delivers precise highs for superb sound Bluetooth versionV3.0 Working range 10m Charge time 2 hours Work time 8 hours Charging voltage 5V±0.5V Battery capacity 520mAh Colors Black, red, blue and orange Speaker (Φ)68mm Loudspeaker output 3W Frequency response 280Hz-16KHz Signal-to-noise ≥95dB Distortion ≤0.5%