The iGPSport SRMini is one of the smallest and lightest cycling radar tail lights on the market, and its overall detection performance is reasonably good, but it comes with a few frustrating quirks. After more than 12 months of testing, multiple firmware updates, and direct comparisons with the Garmin Varia RTL515, this review covers its radar accuracy, excessive high-risk alerts, threat persistence, battery life, companion app, and whether its competitive price makes it worth considering.