Sealey-Road Start-Emergency-Power-Pack-with-Compressor-Sealey-RS132-p-Composite-case-with-moulded-rubber-protection-integral-battery-cable-storage-&-carry-handle-LED-Battery-condition-polarity-check-with-audible-warning-if-polarity-is-reversed-&-charge-indicators-Features-independent-on-off-switch-which-allows-the-positive-clamp-to-be-connected-without-the-risk-of-sparking-&-an-integral-LED-work-light-for-use-at-night-Also-features-an-integral-air-compressor-with-pressure-gauge-f