What is it? The racket produces a charge imbalance, known as static electricity, (although electricity is never static). There is a red light that comes on when you press the on/off button (no cumbersome safety switches, discharges when the button is released.) The charge on the grill is enough to zap a mosquito dead, smoke a fly or zap off a wing or a leg or both! Just push button and zap the insect out of the air. This is not like those cheap yellow zappers out there that are flimsy plastic and have a screen the bug has to get through first. No these are high quality 3,500 Volt bug killing machines! Is it Safe? Yes, it is CE certified safe. The power of a couple of AA batteries would not hurt, only shock a human. How Does it Work? The bugs serve as conductors between the imbalanced rods. Holding the power button on, immediately charges the grill. When you hit the insect, the racket makes a nice spark and a zapping sound when its static electricity is discharged to the insect, (Much like those portable insect zappers). Warranty: 2 Year Limited Specs: Power source: 2 'AA' batteries Input Voltage: 3V, Output Voltage: 3,500V Input Amps: 0.24 ~ 0.26A, Output Amps: 0.03 Ma (plus or minus) - Note 1 - To TEST the racket and make a ZAP... USE a leaf from any plant to act as a conductor. - Note 2 - If oval power rods pop out, just carefully re-insert. If wet, let it dry out completely.