The Leica M7, released in 2002, is the electronic film M: it added aperture-priority autoexposure to the classic rangefinder body, running in parallel with the all-mechanical MP until film M production consolidated on the M-A and MP.
It offers aperture-priority and manual exposure with an electronically controlled cloth shutter from 32s to 1/1000s (mechanical at 1/60 and 1/125 without batteries), TTL flash metering, DX film reading, and 0.58x, 0.72x or 0.85x finder magnifications. Weight is about 610g.
Against the MP the M7 trades full mechanical independence for the convenience of autoexposure, making it the film M for photographers who shoot fast-changing light. The two batteries it depends on are common LR44/SR44 types.
On the used market verify the electronic shutter fires accurately across the range and that the DX contacts read film speed correctly. Finder magnification affects both usability and price - 0.72x is the standard choice - and later MP-style finder upgrades add value.