Xmi X-mini+ MAX v1.1. System type: 2.0 system, Recommended usage: universal, Speaker placement: Portable. RMS rated power: 2 W, Frequency range: 140 - 20000 Hz, Signal-to-Noise Ratio (SNR): 89 dB. Connectivity technology: Wired, Speaker interface type: 3.5 mm. Width: 49.6 mm, Depth: 49.6 mm, Height: 61.1 mm. Battery voltage: 5 V, Battery life (max): 12 h, Battery recharge time: 2 h