| Performance Level | |||||||
| E7 | E6 | E5 | E4 | E3 | |||
| Features | |||||||
| Processing channels | 15 | 12 | 10 | 6 | 6 | ||
| Hearing programms | 5 | 4 | 3 | 3 | 3 | ||
| Ambient Noise Reduction II | • | • | • | • | • | ||
| Acoustic Situation Technology | 11 (IE) | 7 (IE) | 4 | 3 | |||
| Impulse Noise Rejection II | • | • | • | ||||
| Speech Enhancer | II/Linked | Linked | |||||
| Real Ear Effect | • | • | |||||
| High Frequency boost | • | ||||||
| Accessories | |||||||
| Acoustic RC App | • | • | • | • | • | ||
| RC-DEX | • | • | • | • | • | ||