The Philips TAT3509WT true wireless earphones offer a seamless audio experience for portable electronics. With dynamic headphones technology and a frequency response range of 20 - 20,000 Hz, these earphones ensure clear sound quality. The built-in microphone adds convenience for calls and voice commands, suitable for an active lifestyle. The Bluetooth 5.3 connectivity offers a reliable connection with a max operating distance of 10 m, allowing for freedom of movement without sacrificing audio quality. The IPX4 rating provides splashproof and sweat-resistant features, ideal for workouts or daily commutes. With a lithium polymer rechargeable battery and a quick 2-hour recharge time, enjoy lasting performance throughout the day.