, ▁both ▁using ▁the ▁light weight ▁and ▁propriet ary ▁" En hanced ▁Sho ck B urst " ▁protocol ▁stack ▁in ▁ 2 . 4   G Hz ▁IS M ▁band . ▁The ▁n R F 2 4 L 0 1 + ▁is ▁a ▁simple ▁trans ce iver ▁with ▁some ▁logic ▁to ▁implement ▁the ▁protocol ▁stack ▁and ▁is ▁connected ▁to ▁a ▁micro controller ▁via ▁an ▁S PI ▁bus , ▁while ▁the ▁n R F 2 4 LE 1 ▁can ▁be ▁seen ▁as ▁an ▁n R F 2 4 L 0 1 ▁and ▁a ▁micro controller ▁in ▁the ▁same ▁chip . ▁ ▁Cl ones ▁ ▁Some ▁cl ones ▁of ▁Nord ic ▁Sem icon duct or ' s ▁ch ips ▁can ▁be ▁found ▁on ▁the ▁market , ▁such ▁as ▁the ▁SI 2 4 R 1 ▁and ▁the ▁B K 2 4 2 1 . ▁They ▁often ▁demonstrate ▁inferior ▁receiver ▁sens itivity ▁and ▁a ▁higher ▁power ▁consumption , ▁although ▁they ▁may ▁add ▁additional ▁features ▁such ▁as ▁a ▁higher ▁maximal ▁transmission ▁power . ▁ ▁Loc ations ▁Nord ic ▁Sem icon duct or ▁is ▁head qu arter ed ▁in ▁Tr ond heim , ▁Norway . ▁R & D ▁offices ▁are ▁located ▁in ▁Tr ond heim , ▁Os lo ▁( N or way ), ▁Krak ów ▁( Pol and ), ▁Tur ku , ▁O ulu ▁( Fin land ) ▁and ▁Port land ▁( USA ). ▁Techn ical ▁support ▁or ▁sales ▁offices ▁are ▁located ▁in ▁Sun ny v ale , ▁Boston , ▁Chicago , ▁Port land , ▁Hong ▁Kong , ▁Be