The Lenz Body heat system warms the body from head to toe. The lithium packs rcB 2000 can be used for all models of Lenz Heat Socks, Heat Vest, Heat Gloves, Heat Jackets and Heat Pants. The lithium packs are connected with push buttons. The lithium packs are small, light and provide up to 22 hours of warmth at the touch of a button for work, sport and leisure. The charging cradle allows for easy charging and is also ideal as a transport box. This increases performance and concentration even in cold temperatures and ensures blood circulation. The lithium packs rcB 2000 can be controlled directly on the lithium pack. With the Lenz heat app, the heat can also be continuously regulated using a smartphone. Ideal if the lithium packs are under several layers of clothing. Features: Rechargeable lithium pack The lithium pack is connected to the respective product with snap buttons Heating output can be controlled with the free smartphone app (9 heating levels) or directly on the lithium pack (3 heating levels) Fast Charging Function Temperature Protection Storage Mode Charging Function Small, light (approx. 115 grams) and compact Charging cable with USB-C connection Convenient charging in the charging cradle Also compatible with charger from rcB 1200, rcB 1800 and heat pack Size: 8.5cm x 5.5cm x 1.5cm Package Contents: 2 lithium packs rcB 2000 (rechargeable) 1 USB-C charging cable Charging cradle