Pretty decent. I've used it with 20V 2.0A batteries at fairly loud levels and the batteries lasted a decent time, around 6 hours. Here's my problem; Bluetooth is a little lame. The music is sometimes choppy, skipping, etc. Also, I actually lost my Bluetooth connection for no apparent reason. Otherwise, the sound is pretty good for the size and the radio reception is pretty decent, and no I'm not anywhere near cell towers, about 50 miles away.
Black Audio-Technica ATH-M50X Professional Grade Studio Monitor Headphones with Detachable Cable - Critically Acclaimed
200 Review
SAMSUNG Galaxy Watch Active2 (Aqua Black, R820-44mm) π± with Bluetooth, Silicon Strap, and Aluminum Bezel - International
248 Review
Global Version HUAWEI Band 6 Fitness Tracker Smartwatch for Men and Women, 1.47ββ AMOLED Color Screen, All-Day SpO2 and Heart Rate Monitoring, 2-Week Battery Life, 5ATM Waterproof - Orange
190 Review
Sennheiser HD280PRO: π§ Next-Generation Pro Audio Headphones
260 Review