| Repeater | Amplifier |
| It reproduces signal | It increases amplitude of signal |
| Repeater is a sole device | Amplifier is part of repeater |
| It has high gain and low output power | It has low gain and high output power |
| Mainly used in fixed environment | Mainly used in remote and mobile environment |
| Noise elimination is effective in repeater | It amplifies noise along with data signal |