TSGUN must combine with X-431 scanners. It is not standalone. i-TPMS works standalone via phone App, it also combines with X431 scanners. Launch i-TPMS vs TSGUN TPMS Function Module: A Bluetooth TPMS add-on module working with LAUNCH X-431 diagnostic tools (X431 V+, ProS V4.0, ProS Mini, PAD III/IV/VII).
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