⚛️ POINT SAMPLING: Perfect for point probe sampling or continuous sampling in confined or toxic spaces. DC Pump flow rate 0.5LPM with USB recharge. Comes FACTORY CALIBRATED. Turn ON and GO..🌇 DETECT: High quality sensors Made in the UK. Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S) and Combustibles (LEL). USA NIST Calibration..🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. Alarm digital time stamp and logging..💪 STRONG: Robust design made of high strength ABS and Anti-slip grip rubber. Waterproof, dust-proof and explosion-proof exceeding Exib IIB T3 Gb..🕵️ TRUST: ** 1 year limited warranty ** Arrives with calibration and QA certificate ** 100% product test and verification in the USA ** 100% quality guaranteed **. USA Customer support with engineer email response rate less than 6 hours.