The ECOBEE SMARTSENSOR (E10041490) is a white rectangular-shaped wireless sensor with a 3.5-inch display. It operates on a 3V button cell battery and has a voltage of 24V. This smart sensor is compatible with various platforms such as eWeLink, Apple HomeKit, Google Home/Assistant, and Amazon Alexa. It features a sensor technology for temperature monitoring and allows for programmable control with a system switch for heat, cool, or off settings. The Ecobee SmartSensor is a sleek and efficient option for maintaining optimal indoor temperatures.