4 programs of massage. Adjustable massage time up to 60 minutes. Pressure up to 250 mmHg. 4 cameras independent 2 layers. Team Management via Bluetooth and APP. Smart Battery 3h of duration 45 dB, of loudness. Systems of energy saving. 2 sizes: M (up to 170 cm), L (between 171 cm and 195 cm) Warranty 3 years Included in your 4+ pack: 1 pair of boots, 1 Sizen 4+ device, 1 connection between boots and equipment, 1 AC/DC charger, user manual. TRANSPORT BAG NOT INCLUDED IN THE PRICE. Add your transport bag to your order for a special price for a limited time!