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 » Others » 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 12V 15A (180 W) Switched Mode Power Supply 20pcs 20 MHz Quartz Crystal (49S) RDM6300 RFID Card Reader 40 W Inverter (12 VDC to 220 VAC) 20pcs 40 mm Green Propeller