General description This double pack of 40 cell seed trays is perfect for windowsill growing and a great way to get your seedlings off to a good start. Each propagator comes with a base tray, a transparent 40 cell seedling tray (with drainage holes), a clear lid, and 2 circular vent covers to adjust heat and humidity. A pair of potting tools, a seed dispenser, and a pack of 20 plant tags are also included in the set. The unique feature of this growing pack is the inclusion of full spectrum USB lights in the vent covers, providing an excellent alternative for growing when sunlight is limited. Technical specifications Dimensions of each propagator: 38cm x 45.5cm x 12cm USB cable length: 2 metres Length of each branching light cable: approximately 67cm Diameter of vent cover lights: 6cm Diameter of connecting nub: 0.5cm Usage USB powered growing lights (plug not included) Light timer function with settings for 4, 8, 12, or 18 hours Brightness can be adjusted using the on-cable control