Feature: 1. [Waterproof Shell] The shell of the illuminance transmitter is waterproof, and can convert any standard 485 signal into a radio signal transmission, to meet your various need. 2. [Two Channel Communication] Support two channel simultaneous communication, two different communication rates can be set to ensure short distance high speed communication, and long distance reliable communication. 3. [Real Time Monitoring] Illuminance sensor transmitter can monitor its own power, signal and real time data in real time, and upload it through wireless communication. 4. [Unique Encryption Technology] Wireless illuminance transmitter adopt unique encryption technology to ensure that it is not monitored, to ensure reliable control. 5. [Stable Performance] The data is uploaded every 5 minutes, can be used continuously for 3 years, and the performance is stable, so you can use it with confidence. Specification: Item Type: Illuminance Transmitter Material: ABS Product Size: Approx. 11 x 8.5 x 5 cm / 4.3 x 3.3 x 2 in Battery: 3.6V lithium battery 19000mah (Battery Included) Accuracy: ±7% (25℃) Luminous Flux Range: 0-200000Lx Long Term Stability: ≤5%/year Response Time: 1s Output Signal: Wireless spread spectrum signal Transmission Distance: Indoor can worn 3-4 concrete wall, outdoor viewing distance 3000M Weight: Approx. 288g / 10.2oz. Package List: 1 x Illuminance Transmitter1 x Antenna 1 x Matching Battery4 x Accessories1 x Manual