Plantpal Self Watering Globes (1) Plant Watering Bulbs, Aqua Spikes, Automatic House Plant Watering System, Vacation Watering Devices for Healthy Growth. Smart Watering System, Auto Watering Spike. Waters your plants automatically for 2 weeks. No need to worry when going away on vacation. Patent pending moisture sensor (No batteries required). Uses natural technology to water plants as nature intended. Better than glass globes that get clogged up with soil. Plants water and feed on demand to encourage healthy growth Amazing Award winning technology that does the job. No over or under watering, just perfect watering every time. Plants are healthier, stronger and grow twice as normal watering.