... &Li-battary power supply 5.support to connect Technical parameters:1.Horn specification: 4 Ω, 3w,2.L196 × W83 × ... powered supply: 2.5W * 2, 4.battery-powered supply: 1.5W * 2 5.the system frequency response: 150 hz ... ~ 18 KHZ, 6.THD: 1% (1 W 1 KHZ), 7.SNR: 75 db, 8.power voltage: ... 0-9) C88 2013 new products boat shape mini speaker for iphone with number key choose/FM radio