Duo Wireless On-hold Adapter For USbduo

Duo Wireless On-hold Adapter For USBduo Adds Eholde To Virtually Any Standard Phone Support For Up To Two Lines Per Phone Modular Design Add Adapters As Needed Wireless Adapters For Easy Installation Plays Mp3 Files From USB Flash Drives Playback Quality Up To 128kbps Builtin Monitor Speaker Led Status Indicator 5year Parts And Labor Warranty Designed And Manufactured In The Usa Brand: Nel-tech Labs