1 Watt total power, range up to 40 metres (in optimum conditions) THIS IS NOT A CELL PHONE JAMMER, IT IS ONLY FOR GPS L1. RF total power: 1 watt - Block range: GPS L1 within 30~40m radius - Handheld (Portable) Size and Aluminium Case - Supplied with a/c adapter and cigajack type adapter for car - Size: 60 x 100 x 30 mm (weight: 1.5kg (including battery)).