PainPod Heat is a unique device that combines TENS, EMS and HEAT which has shown in clinical studies to be more effective than just TENS or Heat alone. The intended use of the PainPod Heat is for arthritis, muscle pain and chronic pain. The Heat features 8 treatment modes that are either a combination of TENS & EMS, straight TENS or straight EMS. It also features 20 intensity levels and 2 heat settings that can be used independently or with the treatment modes. The Heat device is only compatible with the Heat Pad accessory and vice versa.