Feature:1. Professional Radiation Dose Alarm Instrument: adopts GM counter tube, it is mainly used to monitor X, Y, and β rays with highly sensitivity and accurate measurement.2. OLED display screen: display the instantaneous dose, average dose and cumulative dose rate clearly, visual in night.3. Easy to Use: one button startup and test automatically, and with audible and visual alarm if the test result is over the limit.4. Rechargeable \u0026 Reusable Battery: Built in lithium battery power supply, power saving and High quality.5. Super Mini Size: with 0.7oz lightweight and the size as small as a lipstick, the nuclear radiation detector is very convenient to carry.Specification:Features:Professional Radiation Dose Alarm Instrument: adopts counter tube, it is mainly used to monitor X, Y, and β rays with highly sensitivity and accurate measurement.OLED display screen: display the instantaneous dose, average dose and cumulative dose rate clearly, visual in night.Easy to Use: one button startup and test automatically, and with audible and visual alarm if the test result is over the limit.Rechargeable & Reusable Battery: Built in lithium battery power supply, power saving and High quality.Super Mini Size: with 0.7oz lightweight and the size as small as a lipstick, the nuclear radiation detector is very convenient to carry.Specifications:Material: ABSSensor: 48mm counter tubeMeasure Range: 0.05uSv-50mSvMeasure Precision: -17%...+25% based on 137CsyCharging Time: 2-3 hoursAlarm Responding Time: <10sBattery: 3.7V, 300mAh lithium batteryWorking Environment: Temperature -20~50℃, humidity <95%RH without dewItem Size: 108 * 18 * 15.3mm / 4.25 * 0.71 * 0.60in Item Weight: 19g / 0.66ozPackage Weight: 97g / 3.42ozPackage Size: 14.2 * 6.8 * 2.9cm / 5.59 * 2.68 * 1.14inPackage List:1 * Counter1 * Type-C Cable1 * Manual (English)Package List:1 * Counter1 * Type-C Cable1 * Manual (English)