Working voltage:DC9V Emission Frequency:315MHZ Emission distance:200 m in wide MOQ:500pcs Case material:ABS flame-retardant Working temperature range:-20~80 ípC Service Life: 10years Warrant:one-year replacement,lifetime maintenance Functional Concept 1.Easy to install,can use once plug the power. 2.Apply to blind spots of auditoria,hotel,the ground floor of large buildings,elevator,market and other indoor places to boost signals. 3.To make better the emission distance of the Company remote control products,more sensitively. Size:88¬Lí-57¬Lí-89¬L