Features: TECSUN PL-310ET is the upgraded version of PL-310.It has ETM function.ETM is a tuning method which has been designed by Tecsun. ETM makes it possible to automatically scan for new stations and temporarily store them within the ETM Memory, therefore not overwriting any existing stations in the radio"s memory. This is especially useful when traveling outside your usual place of radio usage. TECSUN PL-310ET DSP (digital signal processing) FM Stereo/LW/SW/MW World Band Radio Receiver. This radio is using DSP si4734 Use the integrated circuits and components, well-designed and manufactured for the majority of radio enthusiasts. Frequency range: FM :64 - 108 MHz ; LW: 153 - 513 kHz; MW: 520 - 1710 kHz; SW: 2300 - 21950 kHz; Sensitivity: FM (S/N=30db):Less than 3 uV MW(S/N=26dB):Less than 1mV/m LW (S/N=26db) :Less than 10mV /m SW(S/N=26dB):Less than 20uV