Specifications:

 1. Dimension: 317*180*28mm

2. Voltage: 220V

3. Wireless and no wiring required. Connected up to 30 sets of signal transmitters

4.Singal receiving effectively around 500M in the open air.

5.Can connect more than one receiver in the same area

6.Frequency: 433M (Adjustable according to different countries demands)

7. SK-300 only can work with single buttons SK-311 AND SK-313

                                            RECEIVER SK-300

        SINGLE BUTTON SK-311 WITH HOLDER SK-311A                                    SINGLE BUTTON SK-313