Broadband users could enjoy a speed boost by purchasing a BT I-Plate, according to the telecoms giant.
While many deals advertise speeds of "up to 8Mb", subscribers commonly receive below this maximum mark.
According to BT, these users could see their connection speeds increase with the product, which works by cutting down electrical interference from other devices in a typical household.
A spokesperson for BT Wholesale told the Daily Telegraph: "We think that the I-Plate can certainly play a part in delivering higher broadband speeds to people suffering poor performance."
BT conducted a survey which found that a 1.5Mb speed increase was typical for I-Plate owners after they had plugged the contraption into a BT master socket.