YS201 is a built-in antenna Mini cell phone signal jammer, such as the size of a mobile phone, very convenient to carry and built-in antenna, put in bag don't have to worry about the antenna will be broken. Built-in high capacity lithium ion rechargeable battery, can work continuously for 2-3 hours, after the battery can work in the process of charging the normal boot. YS201 mobile phone signal jammer： Frequency (European) GSM900, GSM1800, 3G 　 Frequency (American) GSM850, GSM1900, 3G 　 Output Power 57 dbm 　 Typical Coverage 0.5-10 meters (depends on signals) 　 Power Source Battery and power adaptor 　 Working Current 600 - 700 mA 　 Battery Lithium-ion battery 3.7V 1200mAh 　 Battery life 1.5-2hours, recharge 2.5 hours 　 Power Adaptor AC adaptor 110-250V 5VDC 2000mA 　 Car adaptor 12-24V 5VDC 2000mA 　 Antenna Interface 3xOmni SMA antenna 3db (inside) 　 Dimensions (LxWxD) 97 x 44 x 20 mm 　 Weight Jammer 68gm, package 0.5kg 　 Color Black or white 　 Operationg Temp 0-50 degree 　 Humidity 5% - 80% 　 Warranty 1 Year