I like to practice as wirelessly as I can, which means I rely on charge time vs usage time (duty cycle). I am as strong as my weakest link, so having rechargeable devices that play long, and recharge fast is most desirable. The pictured Retekess wireless transmitter/receiver is probably my current weak link, I don't think I can get a full 3 hours playtime out of this item, and it takes 2-3 hours to charge. On the other hand, my Sony wireless headphone plays about 24 hours for a 7-8 hour charge. I have 2 sets of headphones, so it's hard to get caught without one working. I saw the omni guitars set advertised as having 6 hours of service cycle, does anyone know how long the charge time is, and if the advertised playback cycle is accurate?