>>1352618>Instructions says to charge before use REEEEEAnyways~ I love my set, a little overpriced but IMO worth it. On a full charge they last their advertised life, more if not blasting at full volume. I made an 9 hour ride a few weeks ago and they held up. I like to use mine listen to synthwave and say things to Google Assistant on a ride sometimes, makes me feel BladeRunner AF. I've been thinking of finding language learning audio book things to listen to on my rides. Audio quality isn't as bad as Zishan is saying. I prefer these over IEMs because I can't standing feeling my heart thumping in my ears during hard rides and over ears get gross after a few rides. IP55 rated makes these rain resistant too.