Model Number: WY-064 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 Xpansion system) drives a fuller, richer low-end response4. New, langer 45mm driver delivers precise highs for superb sound Working range10m Work time 5 hours Charge time 2 hours Charging voltage 5V±0.5V Batterycapacity 520mAh Speaker (Φ)53MM Loud speaker output 3W Frequency response 280HZ-16KHZ Signal-to-noise ≥95dB Distortion ≤0.5%