HJ-2802 Piezoelectric Transducer Description: Capacitance: 10.6nf Frequency: 25 Khz Input voltage: 35V - 55V Application: Skin massaging Facialcleaning Medical treatment Skin Scrubberforface We willguarantee the goodquality include shape and performancebefore the product will be sent. we can according to customer requested to customise new configuration and dimension and frequency.