Miofive S1 Ultra review: dual-4K dashcam with GPS and driver alerts

A hands-on test of the Miofive S1 Ultra dashcam found it delivers dual-channel 4K recording, built-in GPS and a suite of driver-assist alerts in a bundled front-and-rear package that aims to provide both evidentiary footage and active safety prompts. The reviewer tested the unit in everyday driving and parking scenarios, assessing installation, image quality, features and usability.

The S1 Ultra ships with a 4K front camera with a 140-degree wide angle and a 4K rear camera with a 112-degree wide angle, a 3.5 metre USB-C to USB-A power cable, a six metre rear-camera cable, a USB-C cigarette lighter charger, a short data cable and a 64GB microSD card. The kit also includes 3M adhesive pads and spares, electrostatic films to aid placement, a wiping cloth, a cable-prying tool and a user manual. The camera body has a three-inch display that defaults to a full-front view with a smaller rear view inset, and both lenses are adjustable after fitting.

Installation is straightforward but benefits from some basic cable routing. The reviewer routed the front cable along the passenger-side headliner and trims and the rear cable along the driver-side headliner to avoid excess bulk. The rear...