Feature: 1. Oxygen detection can be performed to make the air visible and quickly measure air quality. 2. High‑definition color screen 2.3‑inch high‑definition color screen display, multi‑interface display, all data at a glance. 3. Smart menu, built‑in smart divergent menu, operation is more convenient. 4. 120,000 data storage, large‑capacity data storage, you can view historical measurement data. 5. Four‑in‑one gas/combustible gas detector/carbon monoxide detector/oxygen detector, triple alarm by sound, light and vibration. Specification: Condition: 100% Brand New Item Type: Gas Detector Material: ABS Weight: Approx. 1013g/35.7oz Product Size: Approx. 7 x 14 x 6cm/2.8 x 5.5 x 2.4in Range Accuracy: ≤ ±5%fs Response Time (90%): < 30 seconds Indication Mode: LCD display real-time data and system status, LED, sound, vibration indicating alarm Storage Environment: Temperature: -10~55℃, Humidity: < 85%RH Working Environment: Temperature: -20~55℃, Humidity: < 95%RH (No Frost) Working Voltage: DC3.7V (Lithium Battery Capacity 1800MAH) (Built-In Battery) Charging Time: 6~8 Hours Standby Time: > 8H Continuous (with slight changes in working status) Plug Attributes: US Plug AC100-240V . Package List: 1 x Gas Detector (Battery Included)1 x US Plug Charging Head1 x USB Cable1 x Hose2 x Accessories1 x Storage Bag1 x Storage Box Note: 1. Please allow 0-2 cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.