iHold A4LP 4-Line Music On Hold Player system for all corded or cordless 2 line or 4 line telephones， "All-In-One" Music On Hold adapter plus mp3 On-Hold Music Player<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Works with 2 line or 4 line Corded or Cordless phones</li><li>Pre-loaded USB flash dirve included， SD slot provided</li><li>Flash then Hold Activation</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41kQaGWOecL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41KEvI6REOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51hFW2FEBGL.jpg" noproxy>