Device Weight - 200 gram (without battery) The maximum electric current - 38 mkA (Ryodoraku method) Battery 9 V ( Alkaline type is advised) Frequency range: 0,10 Hz - 30000 Hz. Frequency spacing: 0,01 Hz Communication with a PC is provided through COM port Complectation : 1.Passive electrode 2.Active electrode 3.Cable for COM port 4.Headphone for frequency 5.CD with software