https://www.overseadia.com/en-US/detail/0a408e08e434117af73752f659cde8da The Yishi Telephone Recording Card Landline Recorder Bulk - Model 21 provides businesses with a reliable and efficient way to manage their phone calls. Supporting Window98/2000/NT/XP/2003/Vista, this recorder boasts multi-recording methods and different recording time range setting. It supports up to 4 disks, allowing you to store your recordings on a hard disk or subarea. With real-time monitoring, extension recording, and call charge-free features, Yishi Telephone Recording Card Landline Recorder Bulk is an all-in-one solution for any business. Plus, its voice mail and voice prompt recording announcement features make it a versatile tool for any company.