Please quote me your price and order payment terms and delivery time. Ultrasonic generator 15 kHz  (Automatic frequency control and power holding, timer function (switch on|off ultrasound) – 1 set Ultrasonic generator 20 kHz  (Automatic frequency control and power holding, timer function (switch on|off ultrasound) – 1 set Invoice To the  Institute of Technical Acoustics of the National Academy of Sciences of Belarus Delivery place – Belarus, city Vitebsk, 210009  ave. Generala Lyudnikova