InTENSity 12 TENS Unit Back Supports Braces 4 Foam mattress extension fills Color:Blue 4 Foam mattress extension fills the gap when using an 80 mattress on an 84 Lowers seat height to 15 Patients will love the convenience of the powerful rechargeable lithium ion battery 2 channels of independent stimulation output 6 body part specific settings (neck shoulder hand lower back knee foot) each equipped with two (2) pre set programs and one (1) manual customize setting 18 program settings total Rechargeable lithium ion battery with USB wall charger and LED charging indicator light Low battery indicator Electrode load indicator 4 stimulation modes: Continuous Pulse Width Modulation Pulse Rate Modulation Combo Modulation (pulse rate and width modulation) Preset and adjustable treatment time Compliance meter store up to 90 sets of treatment records and total treatment time of 100 hours User friendly sleek design Easy to read large LCD display and convenient easy to use controls Full kit includes device 4 pack of InTENSity electrodes pair of lead wires lithium ion battery wall USB charger belt clip instruction manual quick start guide and carrying case 1 year warranty HCPCS* Code: E0730 for TENS unit A4595 for supplies ** Prescription Required: This is a Class II Medical Device