Huawei WATCH GT 4 3,35 см (1.32") AMOLED 41 мм Цифров 466 x 466 пиксела Злато Wi-Fi GPS (сателитен)

Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security.