Features: •Factory calibrated to 32 KHz of frequency. •Safe & user friendly with easy to follow instructions. •Velcro wrist bands, and special silicon-graphite-rubber electrodes. (No paper towels needed). •Automatic electrode control will sound a warning signal if not fitted correctly. •LED timer (7-20-7-20-7). 7 minutes on, 20 minutes off for three continuous sessions. •Choice of continuous mode, LED indicator, plus a reminder to renew the 9 Volt battery. •Warning beep will sound when contact is broken or insufficient. •Belt clip and carry case.