The Peerless PMT-2040N1625AL01-04 20 mm x 40 mm 4 ohm compact micro transducer is designed for laptops, televisions, tablets, and other similar applications. It features a neodymium-iron-boron magnet, a light composite Al cone, and a high-temperature polycarbonate frame to provide reliable performance and impressive efficiency for its size. This unique driver will provide surprising response from 250 Hz and up from spaces where no other driver will fit.