KK70: A smartwatch with a stainless steel chassis, a digital crown and an AMOLED display for under US$50
The KK70 packs plenty of features found on expensive smartwatches, despite its sub-US$50 retail price. According to its manufacturer, the device has a 1.39-inch AMOLED display that operates at 454 x 454 pixels with a 32-bit colour depth. You can control the smartwatch via the display's touchscreen layer or its three physical buttons. One of these is a digital crown too that supposedly delivers haptic feedback whenever you rotate it.
Additionally, the KK70 features an RTL8762DK SoC that gives it Bluetooth 5.0 connectivity. While the smartwatch lacks a GPS module, it has a built-in speaker, a microphone, a heart rate monitor and is IP68 certified. Moreover, the KK70 supports Bluetooth calling, sleep tracking and Android or iOS devices via the Wearfit Pro app.
The KK70 also has a claimed seven days of battery life from its 280 mAh battery. Furthermore, the smartwatch has a stainless steel case, which should make it sturdy. The KK70 is available with metal, leather and silicone watch straps, although third-party straps are compatible, too. Currently, the KK70 sells on AliExpress for US$49.20 plus shipping.