Dbuz5V has been redesigned with flat bottom since Feb-2021. B+ pad is useless on previous version, we removed B+ pad from this version.
Genuine Matek Systems Loud Lost RC Model Beeper Alarm Buzzer 5v Drone FC UK
Matek Systems Digital AirSpeed Sensor ASPD-DLVR, I2C & CAN
Matek Systems LED & Power Hub 5in1 V3.1 Power Supply Board BEC 5V 12V new unused
Matek Systems FCHUB A5 PDB Built-in 184A Current Sensor 5V 2A BEC 2-6S Lipo UK
Matek 5V Piezo Buzzer Lost Model Alarm for Drone FC (Naze32) or PWM Rx UK STOCK
CENPEK Parts and Accessories Signal Loss Alarm and Lost Plane Finder for RC Airplane Drone Anti-Lost Buzzer Tracker