Single-mode Bluetooth devices are called Bluetooth Smart devices and have a dedicated logo:
Small devices such as watches, motion sensors, etc. will be based on single-mode Bluetooth low energy. In order to achieve extremely low power consumption, both hardware and software have been optimized. Such devices can only support BLE. A single-mode Bluetooth chip is often a product with a single-mode Bluetooth protocol stack, which is provided free of charge by the chip manufacturer.
Dual-mode Bluetooth devices are called Bluetooth Smart Ready devices and have a dedicated logo:
Dual-mode devices support Bluetooth BR/EDR and BLE. In a dual-mode device, the two technologies use the same RF front-end and antenna. Typical dual-mode devices are smartphones, tablets, PCs, and Gateways. These devices can receive data sent via BLE or Bluetooth BR/EDR devices, which often have sufficient power supply capability. The power consumption of the communication between the dual-mode device and the BLE device is lower than the power consumption of the communication between the dual-mode device and the Bluetooth BR/EDR device. A dual-mode solution requires an external processor to be sufficient to implement the Bluetooth stack.