SRED is the lightest and most sensitive handheld explosives trace detectors in its class. It adopts the non-radioactive fluorescent conjugated polymers quenching technology to realize rapid and easy screening of large and small numbers of suspect items, vehicles and personnel. With the breakthrough on the key technologies, SRED could detect more than 40 types of explosives, including military, conventional and homemade explosives threats and the important intermediates at trace level (both particulate and vapor). It starts from cold in 25 seconds and has a battery that lasts up to eight hours. With automatic clear-down in seconds, it enables operators spend more time sampling and less time waiting. SRED expedites on-site decision making with less than 10-second threat reporting. With our wireless earphone reporting alarm, it is much safer for the operators and enables better team cooperation. Training can be completed in 30 minutes, and the sensing element could detect 200 times of explosives per piece, further minimizing the impact on day-to-day operations and costs. With thousands of units deployed in China and abroad, the SRED is the most reliable handheld explosives trace detector for critical security applications.