Used just a few times but new patches can be easily purchased. Everything works like new! The InTENSity 10 Digital TENS device allows patients to select from ten pre-set body icons for targeted therapy, making it the easiest and most effective TENS device available on the market today. With the press of two buttons the easy-to-use device is ready to operate effectively based on the area of the body that is being treated. Comes complete with AC adapter for effective therapy on the go. Simple to operate, portable device for pain management. Power Source: Standard 9-volt battery or AC adapter Pulse Amplitude: 105mA Dimensions: 4.5″ x 2.55″ x 0.9