YAMAHA Speaker Piano Black NS-BP182 (BP) (2 units 1 set) Type 2-way bass reflex type (non-magnetically shielded) Speaker unit 12cm cone type Woofer, 3cm soft dome shape tweeter Playback frequency band 60Hz ~ 40kHz (-10dB), ~ 100kHz (-30dB) / impedance 6 Permissible input 40W / maximum input 110W / output sound pressure level 83dB / 2.83V, 1m / crossover frequency 5kHz Dimensions (width  height  depth) 154W  273H  230Dmm / mass 3.3kg (1 units) Accessories speaker cable (2m) 2 This, Saran net 2 months,  Japanese manual