🎧 Quick Overview These are half in-ear wireless earphones with a neckband design, so you wear them around your neck (not like fully-in-ear buds). They use Bluetooth 5.2, giving a stable and reliable wireless connection to phones, tablets or laptops. Driver size: 14 mm dynamic driver — which helps deliver decent sound, with a frequency range of about 20 Hz to 20 kHz (standard full-range sound). 🔋 Battery & Usage Built-in battery: 170 mAh.Â