Sorbus WRCO5-5 Remote Control Outlets With Wireless Remote - Battery Included Use this remote control switch to control any lamps or small appliances plugged into an AC outlet Operates on radio frequency--will perform through walls, doors, and floors up to 60' away Plugs into any standard wall outlet, Power status indicator LEDs No line of sight needed, Remote & manual operation Package contains 3 single outlet remote base units (receiver unit), 1 3-button handheld remote control (sender unit), 1 12V battery (size 23AP), and operating manual