Programmable USB buzzer: Technical data - Grau GmbH Hardware & Software Solutions
F-350PB1 | Push Button Buzzer System | Applied Technical Systems | AV-iQ
Amazon.com: 4 Player Buzzer System. (Mac & Windows Compatible) : Video Games
Boskey Dog Training Buzzer - Recordable Button - Record Playback Your Own Message - 30 Second Recording Button Set of 2Battery Included USB Button Digital Voice Recorders