Fully waterproof, 3/4-mile range. Rechargeable 2-hour rapid charge Lithium Polymer battery. Low to high power transmitter. Rheostat Intensity Dial that allows for gradual adjustment in stimulation intensity. Stimulation type Nick, Constant, and non-electrical stimulating Pager/Vibration. LCD screen displays exact numeric level of stimulation clearly and accurately. Tri-color LED Battery Life Indicator.