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By certification 
Specification
Brand: EVA LOGIK
Description
This US version Smart ON/OFF Switch is an amazing device. Monitor and control your lighting and small appliances with your smart phone. Connect this Z-Wave switch to your existing 3-way switch, create custom scenes, schedule timed events when you're at home or when you're away. This Wall Mounted Switch is designed to work with other Z-Wave enabled devices. Z-Wave nodes of other types can be added to the system and will also act as repeaters.
Feature
Support 3-way installation
Timer/schedule
Item size: 4.5*2.8*1.7inch
Item weight: 240g
Power: 120 VAC, 60 Hz.
Maximum Loads: 500W
Operating Temperature Range: 32-104° F (0-40° C)
Frequency: 908.42MHz
Range: 30m line of sight
Packing List: Switch*1, Faceplacex1, Wiringx1, Swrewsx2, Manualx1
http://www.evalogik.com/
