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. » 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 50pcs SOT89 and SOT223 to DIP PCB Adapter STC89C52RC40C-PDIP chip Compact GPIO Adapter for Raspberry Pi 3 10pcs SOP28/SSOP28/TSSOP28 SMD to DIP Adapter 10pcs 1 mm Red Wire (1 meter length)