SATlink WS-6908 3.5 - Inch DVB-S FTA Professional Digital Satellite Signal Finder Meter
It's used with 12V Power Adaptor when you need to use external power.It includes high capacity Lithium Battery 8.4V3000mAh which works for more than 4 hours after it's fully charged.Package Contents:1x WS69081x Car Charger Cable1x AV Cable1x CD Driver1x Carrying Case1x Strap