Smallest and lightest 4 gas monitor. Combustibles 100%LEL, O2, CO, H2S. 58mm (W) × 65mm (H) × 26mm (D) / Approx.100g. High performance ultra-compact sensors (including 2 in 1 dual). Perfect for the breathing zone. IP66/68（2m, 1h). Loud alarm buzzer 95dB at 30cm. Optional accessories including external electric pump. Successor to a flagship model GX-2009.