Callez is a professional communication headset provider. With our excellent QC and service team, we provide our customers with high quality hands free telephone headsets for Call center, Telemarketing, Office and home base, including headsets for landline telephone, Cordless DECT Phone, Cell Phone..etc. Callez 2.5mm Telephone Headset Doesn't work for Smartphone and Computer. Callez Wired 2.5mm Headset For DECT AT&T ML17929 Panasonic KX-TCA430 KX-TS880 KX-T7630 KX-T7633 Phone and more. High-quality transmission Noise canceling microphone provide clear communication Built-in acoustic shock protection avoid hearing damage Adjustable headband for perfect fit Durable construction to withstand the long-term use Flexible Adjustable Headband Flexible high quality plastics headband can be bent and shaped for all head sizes to relieve the pressure from the headset. Soft Ear Cushion Headset with soft and breathable leatherette ear cushions for hours of comfort. You can wear it for a long-time business talking. Adjustable Boom Microphone Callez headsets' microphone can be rotated up to 330°. Single ear style and microphone can be on either side for better voice catch. Crystal Clear Calls Business-grade Wideband 2.5mm Headset, noise-cancelling mic for crystal-clear conversations, Acoustic Shock Protection(ASP) to protect your hearing. Compatible Phone List (Include but not limited): DO NOT BUY THE ITEM IF YOU CAN’T FIND YOUR PHONE MODEL IN LISTS, PLS CONSULT US. AT&T:SL82418/SL82318/SL82118/SL80108/SB67158/SB67148/SB67138/SB67118/SB67108/TL70008/E5924B/CL82350/CL80109/ML17928/ML17959/ML17939/ML17929/ML993 /992/ 984/E5945Panasonic: KX-NT136, KX-NT343, KX-NT346, KX-NT366, KX-T 7603, KX-T7625, KX-T7630, KX-T7633, KX-T7636, KX-T7730, KX-T7735, KX-TS880Cisco SPA: 303, 501G, 502G, 504G, 508G, 509G, 525G, 512G, 514G, 525G2 Cisco: 7985 Unified IP phonesCisco Linksys: CIT200, CIT300, CIT310, CIT400, SPA921, SPA922, SPA941, SPA942, SPA962Polycom: IP320, IP321, IP330, IP331, SoundPoint Pro SE-220, SE-225Grandstream: GXP-2000, GXP-2010, GXP-2020, GXP-2100, GXP-2110, GXP-2120, GXP-280, GXP-285, BT200, BT201