Wi th special and beaut i ful appearance design, LH-88F (II) is able to accurately detect the leakage of the gas in time and then emits an alarm and notifies the control panel. The detector features MCU processing, high reliability for anti false alarm and alarm failure. The alarm density is 10 percent LEL, and operation power is DC12 volts and AC 220 volts optional. For high stability, energy-saving sensor and long life, it has independently flash & sound alarm and network alarm optional. The product also provides automatically reset after alarm and wall-mounted installation. Transmission frequency is 315 MHz or 433 MHz, while the transmission distance is no less than 100 meters (outdoor).