4pcs Boost Transformer Hello Customers, we would like to inform everyone that we will not be accepting orders until we fix the issue of disappearing shipping cost from your orders. We are still investigating and fixing the settings so that the correct shipping cost will be displayed in every order. Thank you very much 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 X9C104 Digital Potentiometer Module 3 A PWM Driver Module 10pcs 6 MHz Quartz Crystal (49S) 5 mm 940 nm Infrared LED (50 pcs set) 2pcs Wires for Stepper Motors