30 DAYS MONEY BACK & 1 YEAR WORRY-FREE GUARANTEE. Callez, Make Calls Easier! 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, Computer…etc. …