Free Shipping. The ProM-500 with EMS features: Dual Channel * Pulse Width 250 Microseconds * Pulse Rate Adjustable 2Hz-120 Hz * On Ramp Adjustable 0-8 seconds * Intensity Amplitude Adjustable 0-100 mA each channel Cycle on Time Control 1-30 seconds Cycle Off Time Control 0-30 seconds Synchronous, Constant and Alternation are adjustable. This Package Includes: Stimulator Lead Wires (New FDA compliant) 4 Self-stick Hypoallergenic Reusable Electrodes 9 Volt Battery Hard Plastic Carrying Case Instruction Booklet.