Features: High Sensitivity: Geiger technology tube, detecting nuclear radiation, radial , Y radial and X radial, counting instrument with high sensitivity. Easy to Use: One button startup, startup and measurement. counter is used to the accuracy of measurement results. With TFT HD Display: TFT high definition display can display instantaneous dose rate, cumulative dose and average dose rate. It is easy to observe and read in different light environments. Three Kinds Alarm Reminders: The nuclear radiation detector has three kinds of alarm reminders, including sound, flashing light, vibration, and over limit alarm reminders, which can alarm in time to safety. Battery: The Geiger counter is made of High-quality materials, durable, with 400mAh built in polymer lithium battery which has long service life. Specification: Detection and counting: 48mm Geiger counting tube Measuring range: 0.08uSv~9999uSv Measurement accuracy: -17%~+25% based on 137Cs Working environment: -20~50; humidity 95%RH, no condensation Battery capacity: 400mah Battery life: 13~24 hours Charging time: 1 hour Charging : USB-type-c Screen size: -inch TFT color screen note: The actual product may have slight color differences or differences, which does not affect use. size: about 105 x 27 x 16mm Material: plastic colour: Black Package Contents: 1 x Nuclear Radiation Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.