Specification: Ultrasonic Frequency: 2.5 MHz Dimension:100(L)* 30(W)* 135(H)mm Weight : 0.5kg Continuous work time: 8 hours Standard Configuration 1) Main Unit (with 2.5MHz probe) 2) Rechargeable batteries (1.2VX3) 3) Charger 4) Service Manual 5) Export case