AIR COMPRESSION LEG MASSAGER - Use air pressure to emulates the expert hands to deliver a relaxing massage for your calf leg or arm. Inflating and deflating to improve circulation, relieve swelling, cramps, leg varicose veins and other symptoms caused by poor circulation.ENJOY MASSAGE ANYWHERE ANYTIME - Built-in a rechargeable lithium-ion battery, the leg massager offers a 2-hour cordless massage after fully charged, making it convenient to be used anywhere, such as home, office, car, trains. Please fully charge the massager before the first use.3 INTENSITY LEVEL and 2 MODES - The calf massager offers three settings of pressure level (Low / Mid / High) and 2 different type of massage ( M / P), so you can choose the suitable level and massage mode to get excellent effect.VELCRO WRAP DESIGN - Easy to wrap around to calf or arms, fully adjustable to fit a wide range of calf sizes. You can also adjust the wrap size to change the intensity. Cuff length: 22 inch. Search the 3rd image for the vivid information.SAFETY FEATURE and 18-MOUNTH WARRANTY - The sequential compression massager will auto shut off after 15 minutes continuous use for safety. If there is any problem, feel free to contact us and you will get a satisfied solution from our professional service team.