Small efficient amplifier, installed easily. Increases drastically wifi reception; careful though not to manually increase the TX power if the amp is not equipped with an external antenna. Sensitive to electromagnetic waves at 2w, it gives a headache in 5 minutes. At a time when one wonders about the impact of waves on the health of the box, this amp is 20 times more powerful than the law allows an exception ... Satisfactory results for a very reasonable price, recommended.