Reduce Noise By Up to 98% Space A40 has an upgraded noise cancelling system to block out a wider range of distracting noises. So wherever you go, you'll always have the space you need to focus Automatically Tailored Noise Cancelling Space A40 detects external noises and automatically selects a suitable level of noise cancelling for your surroundings. Enjoy your personal space whether you're indoors, outdoors, commuting, or on a flight 50 Hours of Personal Space That's enough playtime to enjoy up to 1,000 songs or 25 movies. The earbuds have a 10-hour single charge playtime, and fast charging gives you 4 hours of listening from a quick 10-minute charge.