4pcs Boost Transformer Please allow 4-6 days processing before ship out. For gearmotors or similar motors, we don’t ship using epacket and will use regular shipping if needed. Please note that regular shipping like singapore post might take 45-60 days to deliver, epacket 20 -35 days to deliver Thank you for understanding. » Electronic Components » 4pcs Boost Transformer This is an ultrasonic frequency boost transformer for ultrasonic sensors transducers. SKU: CQY10026064231 Price: 1.40 $ Product in stock SSL Certificate Quantity Updating cart... This is an ultrasonic frequency boost transformer for ultrasonic sensors transducers. Specifications Frequency: 40 KHz Inductance: 8 mH ± 5% Related Products 40 W Inverter (12 VDC to 220 VAC) 20pcs M2 White Plastic Hexagonal Nuts 10pcs 11.0592 MHz SMD Quartz Crystal (49S) 57HS5106A4 Stepper Motor 20pcs 3x8mm 12 MHz Round Quartz Crystal