NEW High-capacity interchangeable lithium-ion battery (FXBB33) Shaver: Offset double-foil system with dual counter-cutting blades Trimmer: Black graphite deep-tooth t-blade (FX707B2) zero-gap adjustable Shaver: N1 brushless motor with dual ball bearings for more efficiency (10,000 RPM) Trimmer:Long-life N1 brushless motor with dual bearings for more efficiency (7,200 RPM)