Electro-Sense™ Safety First Helmet by STAR Infomatic detects live electrical current up to 2-5 meters away. Features instant buzzer and light alerts, automatic power-on, multi-mode front work light, rear adjustment dial, and up to 18 months battery life. Detects 220V to 220kV AC. Ideal for electricians, linemen, and utility workers. Order yours now and work with complete confidence every day.