Sennheiser UI770 Universal Interface Amplifier with Headset/Handset Switch
The UI770 is the ideal universal wideband Interface box that lets you switch directly between handset and headset, and between phone and PC. Connect a PC, standard phone, handset, a headset of the Sennheiser contact center or office series and even a dictaphone for voice recording.
The UI770 supports the possibility of limiting the speaker volume by simply setting a switch. This secures compliance with the Noise of work Directive from EU (EU Directive 2003/10/EC) and will result in a reduced maximum output level for the user.
More information: https://www.newegg.com/Product/Product.aspx?Item=0TH-0036-00629&ignorebbr=1&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Headphones+and+Accessories-_-0TH-0036-00629&gclid=EAIaIQobChMIn96v2_S52QIVWkwNCh07zQVQEAQYAiABEgK8xfD_BwE&gclsr