The BW Gas Alert Microclip X3 Gas Calibrated is a gas detector manufactured by Honeywell in the United Kingdom. This unit is designed to detect LEL, O2, CO, and H2S gases, making it a versatile tool for various industrial applications. With an expiry date of 6 months from the postage date, this gas detector ensures accurate and reliable readings for safety and inspection purposes in businesses, offices, and industrial settings.