The E-TOP ES-03 is a high-precision wireless temperature and humidity sensor designed for smart home and industrial monitoring. With a compact design and versatile mounting options (wall or desk), it provides reliable environmental data with a long-range wireless distance of over 100 meters. Item No.: ES-03 Precision Environmental Monitoring: Provides highly accurate real-time temperature and humidity readings for optimal indoor comfort and smart environment management. Flexible Installation: Supports both surface wall mounting and desktop placement, offering versatile setup options for any room. Long-Range Wireless Connectivity: Features advanced 433/868/915MHz wireless technology with a transmission distance of over 100 meters, ensuring reliable signal coverage. Smart Home Integration: Compatible with major smart home assistants, including Amazon Alexa and Google Assistant, for convenient voice control and automation. Durable & Compact Design: Engineered with a compact φ50*20 mm profile and high-quality PC+ABS materials, designed for long-term reliability and low-maintenance operation.