Feature: 1. Shape: Pen design, portable 2. Measurement accuracy: - 17%+25%, accurate measurement, rapid response 3. Easy to use: One button operation, easy to use 4. Charging interface: Type-C interface, the green light is always on when charging, and it will be off when fully . High capacity battery, durable Specification: Color: white+orange Material: plastic Sensor: 48mm/1.89in Geiger counter Measuring range: 0.05usv-50msv Measurement accuracy: - 17%+25% Working environment: - 20-50 Humidity: Less than 95% RH, Non condensing durability time: 50 hours (continuous measurement, screen sleep) Charging time: 2-3 hours Size: Diameter 18mm/0.71in, length 108mm/4.25in Package Contents: 1 x Nuclear Radiation Detector 1 x USB Cable 1 x English instruction 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.