If it's for class and classroom, then choose one that can be recorded remotely. In addition, review after class. You can choose to play loud and have AB repeat function. If you don't understand a paragraph, you can listen to it again and again.

Let's see what people want from batteries. If you want to use it every day, buy that kind of lithium battery, which can be recharged.

Recommend several models for you to see:

The new V20 is stereo, which can record at a distance of 25 meters, but with dry batteries, the sound is loud and the recording effect is good.

Xinke V 18 adopts lithium battery, which can last for 60 hours and has the function of long-distance recording and noise reduction, but the sound is a little low.

Yajia A 10 is a new model. The card can expand the memory to 16G. It's made of lithium battery, and the external sound is very loud.

San Pu V2 1 has a good cost performance, that is, it uses dry batteries.

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