In just a couple of weeks, THREE such receivers have been in my use. Sound quality and volume are great! The tunnel type phase inverter significantly improves the sound. I am not returning to this topic. Now about the features. 1. When the voltage on the battery drops to 2.7 V, radio reception is interrupted. A click is heard in the speaker when turned on / off, but nothing more. So a deeper discharge of the battery is almost impossible. 2. It is impossible to know the end of the battery charge. The indicator glows red despite being fully charged or even when the battery is removed. How to avoid overcharging remains a question. 3. Three AA batteries can be installed. But the battery will have to be removed, as it is installed across the batteries. This was probably done in order to UNLEASH the circuits of charging the battery and batteries, that is, so that charging could not damage the batteries. 4. If you insert a "slow" flash drive, then playback is difficult. Playback is constantly interrupted to "reload" the file (song). On a fast flash drive - playback is excellent. Plays files even from folders. First, files from one folder sound, then from the next . 5. Songs can ONLY be played in order. Well, pause, next, previous. 6. The receiver remembers the last song and next time starts from the START of the song where it was stopped. Probably, the receiver keeps a file with a "mark" where it stopped. Hence the question: if you often CHANGE flash drives, how soon will the receiver's memory "fill up with garbage" with the "stop" marks of all flash drives? 7. On all receivers, the battery cover is difficult to open. With the same difficulty, the antenna rises. But the antenna swivel can be loosened, and the compartment cover can be. broken (( 8. Since the design of the receiver is quite dark, the backlighting of the scale is really not enough. 9. There is no headphone jack, that is, in a hospital room, for example, it will be inconvenient. My assessment: the receiver is good! I recommend!
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