4pcs Boost Transformer Shop: There may be some days to weeks delays in deliveries. Thank you for understanding!! » All Products » 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 20pcs 19 mm Conveyor Belt MC33886 Dual Motor Driver 50pcs NE555 Timer (DIP-8) LM2596 High Efficiency Adjustable Step-Down Voltage Regulator Adjustable DC-DC Boost Module