The NIB & SEALED TRANSFORMERS Bluetooth Wireless Headphones Ear Buds - OPTIMUS PRIME are a stylish and functional pair of earbuds that offer a frequency range of 20Hz-20KHz and a transmission distance of 10 meters. With a blue color and a sleek in-ear form factor, these earbuds feature Bluetooth version 5.3 and wireless technology for hassle-free connectivity. They are equipped with active noise cancellation, built-in microphone, and a rechargeable battery for convenience. Designed for the modern on-the-go individual, these earbuds from the brand Tws are perfect for listening to music and taking calls while on the move.