The 1s flying drone flight controller does not have a buzzer module. You can purchase the buzzer from this link and use the TX to drive the buzzer to add a buzzer to your flight controller.
Specifications:
Model: 0905 Buzzer Name: Buzzer / 18-19mm canopy can be installed with Buzzer / 20mm modified DJI O3 lens canopy can be installed with Buzzer
Voltage: 5V Current: 30mA Weight: 0.8g
Package Included: 1 x Buzzer or 1 x 18-19mm Canopy or 1 x 20mm Modified DJI O3 Canopy
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