** MAP POLICY** Swiss Digital must be within 25% of MSRP if sold online. MASSAGING FEATURE: Keep your back fresh and relaxed with the high air-flow back panel design and a back-vibrating massager to soothe any muscle aches. Your battery bank will power the massaging feature. TSA-FRIENDLY DESIGN: Hassle-free travel through airport security checkpoints SMART CHARGING READY: Pre-wired USB charging system (battery not included). Charge your devices while you are mobile with the USB port which is powered by your own battery bank (USB Power Charging. Patent No. 10574071).