... a local computer. Adopting wireless GSM network with advanced digital technology, widely to protect for home, office building, public place. ... solar energy, low-cost, non-polluting, renewable, high security, less investment and other unique advantages, their life expectancy ... full time: under sunshine, about four hours Specification 1.GSM Band:GSM 900/1800MHz (850MHz/1900Mhz selection) power: 1W.2 ...