The ecobee SmartSensor Room Temperature Sensors in White, Pack of 2 (EB-RSHM2PK-01) are wireless sensors that operate on a 3V button cell battery. They are designed for use with various smart home platforms such as Apple HomeKit, Google Home, and Amazon Alexa. These sensors feature a sleek design with a 3.5-inch display and can be wall-mounted or surface-mounted. They are programmable and offer two cool stages, making them a versatile and efficient choice for maintaining optimal room temperatures.