1. play music with U disk/TF card 2. FM radio 3. support AUX output 4. USB&Li-battary power supply 5.support to connect Technical parameters:1.Horn specification: 4 Ω, 3w,2.L196 × W83 × H52mm, 3.USB-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: DC5V 500 ma/USB POWER.Detailed ...