The product innovation is based on special sensorics removing the need for any switches at all. Such detection technology means that simply an approaching hand or a light touch causes SOI to light up. Once a given time period has elapsed SOI switches off again fully automatically and energy efficiently. No nearby hands means SOI does not light up. Thanks to high quality LEDs and optimised control circuit programming battery life is enhanced and lighting power increased. After approximately 6000 cycles (= lighting up and automatically switching off) a change of batteries will be necessary and is a simple procedure to carry out. Weighing less than 50 grams in total SOI is of negligible weight in every bag.