The Motorola W377 is an entry-level flip phone, nearly identical to the W375. It is still tri-band receptive and has the exact same dimensions, camera, built-in FM radio, external indicators and mp3 playback. Its only updates include a large increase in memory size, up to 10MB from 1.5MB, and the inclusion of Bluetooth wireless technology to allow for wireless headset or headphone use. The increased memory also means that the W377 can hold up to 500 contacts in its phone book, as opposed to only 100 in the W375. Battery length is roughly the same.