Brand Name:GVDA; DIY Supplies:ELECTRICAL; Origin:Mainland China; Model Number:AS5750L AS5750; With LCD Screen Or Not:No; Certification:CE,FCC; Is Smart Device:NO; Measurement Range:Less than 0.5oz/yr, for all halogen based refrigerants; Gas Type:All Refrigerant Gas; Alarm Mode:Sound & light alarm; Response Time:Instantaneous; Warm up time:<20 sec(25°C,60%RH); Continuous Operation Time:9 hours (slightly vary with opeartion); Leak Size Indication:Indication Light & Alarm Buzzer; Sensitivity Adjustment:Overcharge / Overcurrent Protection; Power Indication:Battery Indication; Operation temperature:0°C~ 50°C ;; Power:3 * 1.5V AA Alkaline Batteries(NOT Included); halogen gas detector:Refrigerant Gas Analyzer; Refrigerant Analyzer:Freon Leak Detector; R134A:Gas Leak Tester;