Model no.: sp-1002 2.1 specification: power: ac 220v-240v 50hz; rated power: 150w; total output power: 120w; output power: sub woofer: 80w 2ω thd1% 100hz, satellite speaker: 20w× 2 4ω thd1% 1khz; driver unit: 8"sub woofer× 1+3" mid-range× 2+1.5"tweeter× 2; features: fm radio; led display; bluetooth function; with usb 2.0, sd card port; mp3/wma available; full function infrared remote control; karaoke function with dual microphone jacks; high-frequency switching power transformer; built-in high efficient digital power amplifier; color: black, silver; brand: sea piano; packing: color box size: 41*30*54cm, master carton size: 61.5*42.8*55cm, 2 boxes make 1 master carton; compatible with tv, computer, cd, vcd, dvd, mobile phone, mp3 player, etc. speaker material: mdf wood+plastic adjusting method: keystroke+knob play frequency usage: karaoke, computer, home theater system, radio, portable player, tv, mobile phone