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It is very easy to use, readable, light and compact. LED diodes enable you to work in areas with poor lightning. GSM detector is powered internally using AAA battery or accumulators and externally 4.5-16V DC (50mA).
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.