Yield: Main reason for purchase. I like the microSD card slot called TF. I put 32GB of music in it and it's fantastic. The outer header allows you to easily make adjustments. See photo. Increase volume slightly (press and hold), forward or backward to find songs. Adjustable headphones fit my head well. Use with a computer as long as you have a blue tooth. Perfect. I went to Wendy's for frost and internet use. I have set up a Bluetooth connection. I wanted to check range, so I went from a restaurant to YouTube and then to the bathroom. The sound quality was still perfect through the hallway and through the closed door. Thumbs up. Obviously use with phone. You can use the hands-free function when Bluetooth is activated and connected to your phone. There are 3 modes. TF/microSD card mode, FM radio mode and Bluetooth/phone mode. It's extremely versatile and as I said, get an 8GB-32GB microcard and go to your workout, ski, hike, jog. Headphones fit well. I have 2 universal chargers so I can connect the USB cable to the charger (not included). Otherwise you need to connect it to your computer. I had no trouble inserting the cable into the headphones. Just paste it. Don't try to paste it. I haven't tested the battery from full charge to full discharge, but I keep it fully charged. I really don't know what more you can ask for at this price. Use it with your phone, listen to FM radio or use a MicroSD card and enjoy this feature. This is a must have and I don't leave many reviews but I want to help people who are unsure if they should buy this. Trust me, it's worth more than $19.99. I bought blue.
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