Super Loud 5V Active Alarm Buzzer Beeper Tracker 5pcs 12X9.5mm and 5pcs 9X5.5mm for FPV Racing Drone Specifications Product Name : 5V Active Magnetic Buzzer Min Sound Output at 10cm:85dB Working Voltage: 5V Main Color: Balck Materials : Plastic, Metal 12X9.5mm Beeper Tracker Size(Pin Not Included) : 12 x 9.5mm/0.47" x 0.37"(D*H) Weight : 1g/pc 9X5.5mm Beeper Tracker Size(Pin Not Included) : 9 x 5.5mm/0.35" x 0.22"(D*H) Weight: 0.65g/pc Package Includes 6 * 12X9.5mm Beeper Tracker 6 * 9X5.5mm Beeper Tracker