Product details: - Cable length: 90-100 cm - Batteries (4x 1.5 V AAA) - Information about the adhesive electrodes: Before applying the gel pads, make sure to clean your skin of oil and sweat. To extend their lifespan, it is recommended to clean them with a damp cloth while the device is turned off. The adhesive electrodes are heat-sensitive, so avoid exposing the pads to direct sunlight or placing them on hot surfaces.