Microlab H 21. System type: 2.0 system, Recommended usage: PC, Speaker placement: Tabletop/bookshelf. RMS rated power: 36 W, Frequency range: 50 - 20000 Hz, Signal-to-Noise Ratio (SNR): 70 dB. Connectivity technology: Wireless, Speaker interface type: RCA, Wireless technology: Bluetooth. Housing material: MDF. Width: 116 mm, Depth: 198 mm, Height: 202 mm