Size (length*width*height): 21cm x 15cm x 4cm

What's in the box:

Wireless Remote Control Lighting Switches 3 Channel (1x)

Wireless Lighting Remote Control Switch For House Home Electrical Lighting Stuff 

Features:-
Remote Control Distance : Indoor 25m, Outdoor 100m 
Working Voltage : Ac 200-240V 50/60Hz Output: 200-240V
Remote Control Battery: 12v 23a(Not Included) Working Frequency: 315mhz 
Remote Size: About 9.5 x 3.8 x 1.3cm 
Receiver Size: About 4.7 x 9.4 x 2.2cm

Special Features:-
Remote Control with Wireless Radio Frequency Digital Transmission Technology And is Not Influenced With Direction.
No Interference to Each Other.

Usage:-
For Lamps and Lights It is suitable for the Hall, Living Room, Bedroom, Dining Room, Work Room, Office etc.

Product Function:-
1. A/1 Will Light After Power On. 
2. A/1 Uses To Turn On /off The Blue Group, B/2 Uses To Turn On /off The White Group, C/3 Use To Turn On/off The Yellow Group, D/4 Use To Turn On/off The Green Group, On/off Means Turn On/off The Whole Item. 
3. Manual Lighting Sequence (Wall Switch Control): A/1 Turn On, B/2 Turn On, C/3 Turn On, D/4 Turn On, The Whole Circuit Turn On. 
4. Free Time Button, Will Delay 18 Seconds.