Features: * Adopt high quality semiconductor heating sensor, featuring good stability performance. * Design with MCU intelligent supervise control and SMT chip technology, providing intelligent protection of family safety. * Can give visual and audible alarm in time when leakage concentration reaches the set value. * LED-numeric display technology, shows clearly instant gas leakage concentration. * Feature three indicators: POWER, STATE, ALARM. * Plug and play, simple to use. Portable body design, easy to carry and store. * Can be used to detect artificial coal gas, natural gas, liquefied petroleum gas and other combustible gases. Note:There may be 1-3mm errors due to manual measurement. Specifications: Model: BRJ-502D Material: ABS+Electronic Components Color: White Plug Type: EU Plug / US Plug (Optional) Power Voltage: AC 100V~240V Power Frequency: 50 / 60Hz Rated Power: