Innovative Telecom SX8800-P USB Flash Drive Digital On-Hold Player for PBX and Key Phone Systems Superior sound quality on any PBX or KSU phone system. 512MB USB Flash Drive included, SD card slot also provided. Plug and play -The included USB flash drive is preloaded with hours of royalty free music and standard thank you for holding messages Includes - power adapter, USB Flash drive, audio cables and manual 5 year parts & labor warranty. Made in USA