Indoor Year Month Day Time Week Temperature Humidity Display Large LED Screen Wall Clock with Thermometer Hygrometer 485 Type 100‑240V Item Type: Temperature and Humidity Display Material: Aluminum Alloy Color: As Pictures Shown Weight: Approx. 2165g / 4.8lb Line Color: Red A, Black B Power Supply: 10-30V Installation Hole Pitch: Approx.34.8cm / 13.7in Product Size: Approx. 49x29x4cm / 19.3x11.4x1.6in Remote Control Battery: 1 x CR2025 Button Battery (Shipped Without Battery) Maximum Power Consumption 0.8W 0.8W A Accuracy  Humidity ± 2% RH (60% RH, 25 ℃) Temperature ± 0.4 ℃ (25 ℃) B Accuracy(Default) Humidity ± 3% RH (60% RH, 25 ℃) Temperature ± 0.5 ℃ (25 ℃) 20 ℃~+60 ℃, 0% RH~95% RH, non condensing Working Temperature of Transmitter Circuit -40 ℃~+120 ℃ Default Value: - 40 ℃~+80 ℃ Working Humidity of Probe 0% RH-100% RH Working Temperature of Probe 0.1 ℃ Temperature Display Resolution 0.1% RH Humidity Display Resolution 1s Temperature and Humidity Refresh TimeLong term stability Humidity Humidity ≤ 1% RH/y Temperature ≤ 0.1 ℃/y Response Time Humidity ≤ 8s (1m/s wind speed) Temperature ≤ 25s (1m/s wind speed) RS485 (protocol) Output Signal Beijing time, automatic operation after power failure Time Display Wall or Hanging Wire Installation: When connecting 485 signal lines, note that the two lines of A/B cannot be reversed, and the addresses of multiple devices on the bus cannot conflict. Signal Communication (Upper Socket) Line Color illustrate Red 485-A Black 485-B Application: It is widely used in interrogation room, conversation room, laboratory, construction site, factory workshop, greenhouse, warehouse, wine cellar, cold storage, machine room monitoring system, sewage treatment, medical health monitoring, smart home and other fields.