TherapeutixUSA Specifications – The A and B channels let you use both lead wires each having 2 pre-gelled pads. – The screen is large and there are 24 modes. – There are 4 pads included with the unit—2 small and 2 large. – The battery is fully charged when you get your unit, so just hook it up, and use it. – When you do need to charge it, 30 to 60 minutes is all it will take. (The User’s Manual states to let it charge for 10 hours—disregard that) – The battery indicator tells you how much life is left in the battery and 3 bars means it is operating at full power being fully charged. – It uses a built-in lithium-ion rechargeable battery providing you with many hours of uninterrupted pain relief. – The wires are 59-inches (4.9 feet) and snap to the pads. – Portable: Being small, just slip it into your purse or pocket for pain relief anywhere you go. – The unit locks by pressing the ‘T’ button where a lock icon will appear in the upper right corner so that you will not accidentally change your settings. Product information 1) Therapeutix RXL Ultra Unit 2) Two each lead wires 3) Two small massage pads 4) Two medium massage pads 5) One pad 6) cord saver 7) A USB and A/C wall charger 8) An acupressure point guide 9) A User’s Manual Key Features: Each electrode port has individual intensity Adjustable timer to use the massager 24 different modes Electrodes Included: 2 small massage pads and 2 medium massage pads FDA Approved: Yes