• Small easy-to-use unit for keeping a constant check on • wristband and/or work-surface connection to ground.• If a fault is detected, LED will flash and audible buzzer will • sound.• Stand-by operation for when operator leaves bench – • flashing LED reminds operator to re-connect to ground • on return.• Comes with 9V power supply unit which can be plugged • directly into mains. • Conforms to IEC 61340-5.