The ECOTEST's MKS-05 “TERRA” series dosimeters/radiometers are delivered with a Bluetooth channel that connects the device to a PC. They feature a luminescent backlight display, simultaneous indication of units, threshold level and real time, analog ten-segment indicator of radiation intensity, measurements with a preset error, audible and vibrating alarm, battery discharge indicators, integrated memory up to 1,200 measurements, five measuring channels, with indication of different data on one display, integrated gamma, beta sensitive Geiger-Muller counter, gamma background evaluation in 10 seconds, auto subtraction of gamma background during measurement of beta contamination, average measurement results, automating measurement settings, alarms for each detected gamma-quantum or beta-particle, alarm for exceeded threshold levels, two AAA battery slots etc. They are highly shock resistant, and are small in size, and also very lightweight. They are a highly professional tool, durable, and reliable for continuous use.