TR635: Compared with ordinary radios that can only rely on built-in antennas to receive signals, this AM FM radio adds a 3.5mm external antenna interface. You can use an external antenna to enhance the AM signal, allowing you to listen to clearer radio stations; the built-in DSP chip displays the frequency in numbers, so both the elderly and children can clearly see the dial and simply adjust the frequency; the ATS function can automatically search nearby All radio stations make your operation easier; additionally add time function, you can adjust the 12/24 hour mode; powered by AC power cord (included), you can also use 3D battery power when outdoors; high and low bass mode can bring you A unique music experience, whether it's high notes at a party or low notes when you're alone, the clear sound quality meets your needs; Retekess TR604 portable radio with large frequency dial display ,volume adjustment knob and threaded knob tuning. The transistor radio with internal magnetic antenna, you can get the optimum, reception by rotating the direction of the radio When receiving AM. TR604 small radio with a portable handle, makes this the perfect radio for some enjoyable time at home, the park, beach, picnics, gym or playroom.