Get firm, sexy arms in 20 minutes a day with the Slendertone System - Arms Accessory for Toning Triceps. Uses electrical muscle stimulation (EMS) technology to generates signals that are sent via the garments and pads and that electrically stimulate the muscles to contract. Requires System Controller for use (sold separately). Slendertone System - Arms Accessory for Toning Triceps Includes: 2 Slendertone arms garments 4 straps Unit connector 4 adhesive gelpads Slendertone pouch Instruction manual Quick Start guide Adhesive pad instruction sheet Accessory sheet Product Features: FDA cleared for use toning the triceps Design ensures that all of the muscles contract and not only those directly under the pads; this technology has been used in hospitals and by physical therapists for over 50 years 3 programs - features beginner, intermediate and advanced level programs; for best results, it is recommended that you do 3 - 5 training sessions per week Ergonomic design - fits arms measuring 8-1/2 to 14-1/2cm - Slendertone straps on to the arms to secure contacts in place - Adhesive GelPads make direct contact with the skin so signals can be sent to your muscles - Can tone both arms at once GelPads should last approximately 20 sessions - to prolong their life, smear a few drops of water on the back and wipe skin clean of any lotions, etc., before use Measures approx. 8.7"L x 3.5"W x 0.5"H Made of polyester, foam and nylon Hand wash, air dry Made in Ireland/China Comes with a manufacturer's 1-year limited warranty Warnings: Should not be used while sleeping Persons with pacemakers or other implants, who have cancer or cognitive dysfunction, or have epilepsy, who have had recent surgery or injury, are under medical care or who are pregnant should not use the product unless they have cleared it with their doctor first The long-term effects of chronic electronic stimulation are unknown