You can improve the range of your TellStick ZNet Light V1 / V2 by having several Z-Wave products, which together create a mesh network between the devices. All non-battery-powered Z-Wave devices can repeat the signal. The more you have the better range and reliability you get. It is also possible to buy an extender. For the 433MHz products, it is unfortunately not possible to extend the signal. If this creates a problem for you, we recommend that you use Z-Wave products with the associated TellStick.