SCS 724 Wrist Strap Workstation Monitor Audio Beep Visual LED, 2 Wrist Straps Monitored 26VX49 No Load RPM 0 to No Load RPM 0 to 2200 Corded Cordless Cordless Battery Included Bare Tool Bare Tool Voltage 18 V Cordless Tool Battery Type Li Ion Switch Type Lock On Tool Weight 5 lb Includes Backing Pad ATEX Sira 18ATEX2243 Provides Stable Continuous Monitoring of the Wrist Strap's Path to Ground Presence of its 1 megaohm Safety Resistor Upper Resistance Limit 10 megaohm Lower Resistance Limit 1 megaohm Number of Wrist Straps Monitored 2 Number of Dissipative Surfaces Monitored 1 Number of Metal Grounds Monitored 2 Power Required Minimum 100V AC Power Required Maximum 240V AC Alarm Type Audio Beep Number of Wrist Straps Monitored 2