1. for MP3/MP4/Mobilephone/IPOD/CD/PC/TV /DVD 2. Flip-on inside dock connector for universal sources 3. High-performance SPK 4. built-in AMP 5. Built-in subwoofer, 2.1CH 6. IPOD rechargeable and entirely remote control 7. Aluminum speaker box / piano finish painting 8. Subwoofer choice 9. Automatically switch between L/R soundtrack channels of external speaker 10. Stand-floor ITOWER design 11. Optional fitting WP-2MIC can be used for loud-speaker and karaoke 12. SUB output /AUX/ MP3 input Specification: Component Size:2''''''''''''''''X4+1''''''''''''''''+3.5''''''''''''''''(IT601) Output Power :36Wx3 Frequency Range: 30Hz~20KHz AC (110V~240V 50~60HZ) Optional: IT601-300 to be 2.0CH System DP-6SW/YA300 /IT601-300 to be 2.1CH System WP-1IB wireless blue-tooth connector WP-2MIC wireless MIC