Very intuitive turn & shift user-interface
Simple and unambiguous markings
Constant speed of the drug injection
Audible click confirming the setting of the dose
Fully transparent cartridge holder
High robustness
Modern design
Convenient emplacement of the trigger button
Dose counter: information about unconsumed doses in the pen
Benefits
Spring-assisted, low-force delivery
Intuitive user interface including visual feedback
Dose counter
No risk of under-dosing
No priming before the first use