Yealink Phone Headsets for Office Phones YHS34 Lite QD to RJ9 Wired Headset Compatible with Poly Avaya Snom Grandstream Phones Desk Landline Headset with Microphone -Mono/72g/2.1m CableCOMPATIBILITY Yealink Desk Phones Series T2x T3x T4xG T4xS T4xU T5x VP Teams MP SFB MP Zoom MP Teams T5 SFB T5 Poly VVX x01 VVX x10 VVX x50 AVAYA 96xx 16xx J1xx SNOM D3xx D7xx D8xx Grandstream GRP GXP (Please check detail page) Runs Right Out of the Box A QD (Quick Disconnect) to RJ9 plug and play makes the connectivity to Yealink IP phones at ease. The phones can automatically optimize acoustic parameters for YHS office headsets, gives you optimized