Please be kindly noted，the listed product is produced and distributed abroad and subject to the laws of its country of origin。    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: <4W  Alarm Concentration: 3%LEL~20%LEL  Alarm Loudness: ≥85dB  Working Temperature:  -10℃~50℃  Working Humidity: <97％RH  Item Size: 12 * 6.9 * 2.8cm / 4.72 * 2.72 * 1.1in  Item Weight: 93g / 3.28oz  Package Size: 13.5 * 7.5 * 5.5cm / 5.31 * 2.95 * 2.17in  Package Weight: 148g / 5.22oz    Package List:  1 * Gases Detector