Amazon.com: SHARP Digital Alarm Clock with 2 Ultra Fast Charging USB Quick Charge Ports - Twice as Fast as Conventional USB Chargers - Battery Back-up - Easy to Use : Home & Kitchen
USB Pushbutton Buzzer (PBT-Series) / USB Pushbox (PBL-Series) - Manual - Grau GmbH Hardware & Software Solutions
Yocto-Buzzer - USB sound signal generator
Photobooth Fernauslöser via USB Buzzer programmierbar | Studio-Ausrüstung.de
Programmable USB buzzer: Technical data - Grau GmbH Hardware & Software Solutions
Buzzers.ch - Programmable Buzzer "Mushroom" USB , Programmable Hand Switch
I2C-USB module and buzzer to Pixhawk 2.1 cable : Drones, UAV, OnyxStar, MikroKopter, ArduCopter, RPAS : AltiGator, drones, radio controlled aircrafts: aerial survey, inspection, video & photography