In this pack you'll find: 4 x Belts (50cm) 3 x Split Docks 3 x Tethers (1x4) 1 x Tether (1x2) 1 x Convertor Dock This Connection Pack has been assembled with our upgraded LMB 2.0 components, and allows you to connect up to 4 light kits and power them using a USB Power Cable to a USB Power Bank or USB Power Adaptor. Important Note: Our LEDs can be powered using mains power via our USB power cables connected to the correct power adaptor. Our components all run on a very low voltage of 5V, so it is essential to use appropriate power adaptors. As a guide, look for a power adaptor with a rating output of no more than 4 Amps. Do NOT power using adaptors that have an output of any more than 4amps. Be very careful of using aftermarket universal adaptors as quite often these "cheaper" adaptors do not output stable current. Electronic spikes can dramatically shorten the life of our LEDs and can also result in them burning out or becoming very dim. Using such adaptors will void the warranty of your lights. Light My Bricks LEGO Lighting Components provide an easy DIY way for LEGO fans to customise their models using LED lights. With a wide variety of colours, lighting options and effects, anyone can light up their LEGO set. All our components are plug and play - no electronics knowledge needed!