product name : mini portable speakers (vibration speakers ) 

model : CSP 018

360 degree stereo sound

frequency : 80hz - 18khz

audio output : 3.5 mm audio cable

sound sources : TF card , mp3 , mp4 , iphone , ipad , pc or other device with 3.5mm stereo jack

power solution : DC adaptor 5v , usb cable , built in lithium battery