PURO Softball. System type: 1.0 system, Recommended usage: universal, Speaker placement: Portable. RMS rated power: 1 W, Peak Music Power Output (PMPO): 2 W, Frequency range: 100 - 20000 Hz. Connectivity technology: Wired, Speaker interface type: 3.5 mm. Width: 50 mm, Depth: 50 mm, Height: 50 mm. Battery voltage: 4.2 V, Battery recharge time: 2.5 h