Telephones; Communications headsets for use with communication radios, intercom systems, or other communications network transceivers; Cordless telephones; Electrical phonograph record turntable cartridges; Headsets for telephones; Headsets for use with computers; Loud speakers; Telephone call screening and blocking device consisting of a microprocessor that uses the telephone cord between the telephone and wall jack for the purpose of blocking unwanted calls; Telephone headsets; voltage, amp...