Smart Visible Light Checker for Smartphone with App

[FEATURES] 
*The world smallest visible light meter (30mm) 
*Real-time display of measurement results 
*Compatible with Android and iOS 
*Ultra low power consumption 
*Easy to carry and convenient 

[DESCRIPTION]
It is tiny, beautifully designed with Aluminum body Semiconductor Sensor that connects to your Smartphone to measure, collect and analyze Visible Light, Lux. Measure indoor illumination (fluorescrent lamp, LED light etc.) intensity. 
The unit is fully powered by the Device (Smartphone / Tablet), No battery or charger needed. 
The Smart VL Checker is fully compatible with iOS and Android 4.2 above and output is 2.0 V above, earphone jack is 4-pole. The application can be downloaded from the App Store / Google Play by searching "smart checker" or "FTLAB" 
Attention! * If you want to use another smartphone, Calibration First! 

Specification 
Measurement: Visible light 
Wavelength: 400-780 nm (peak wavelength 560nm) 
Measurement error: 15% Range : 0-10,000 Lux 
Size: 30mm (incl. headphone jack 47mm) 
Workable temperature: -20-+50 C Workable humidity: 80%