Doorbell/Chime Intercom System - 20m Wired Range (cable included) This intercom system is perfect for use at home, the office, in a shop or anywhere that you may need to converse with another person easily. It is designed for indoor use and everything is supplied that you need to get the system operational including the desktop and doorbell intercom units and 20m of cable to connect them together. How to install? 1. Before inserting any batteries into the units, insert the provided cable into the relevant connections on the back of the intercom units (linking them together). 2. Insert 2 ‘C’ cell batteries into each unit to power each device (batteries NOT included). How to Use? 1. Press the button on the doorbell unit, this will call the desktop unit. 2. Press the talk button on the desktop unit to answer, you can now converse with the person at the other intercom unit What's included? 1x Desktop intercom unit 1x Doorbell intercom unit 20m Interconnect cable 1x Instruction manual Technical Specification: 4x ‘C’ cell batteries, 2 per unit (not included) Colour – White Supplied cable length – 20m Dimensions desktop unit – 135mm x 105mm x 55mm Dimensions doorbell unit – 85mm x 25mm x 65mm Total weight – 450g