... Design Mini Speaker with Micro SD/USB 1. Supports AUX output. 2. Support sound card reader device. 3. Horn specification: 4 ... Ω, 3w4. L196 × W83 × H52mm5. USB-powered supply: 2.5W * 26. ... Accessories Available: housing,hansfree,charger,battery,silicon protector,screen protector,usb data cable, memory card, card reader,holder and etc ...