The key specifications of the ADV Timer For GZLD & GDHD are — Supply Voltage: 24V-240V; AC/DC: 50/60 Hz; Switch: 1 A IP65. These specifications are based on the standard GEM Equipments design; always verify against your machine's requirement before use. GEM Equipments Pvt. Ltd., established in 1984 and ISO 9001:2015 certified, is one of India's leading manufacturers of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, based in Coimbatore, Tamil Nadu.