1.Contain all functions of M8; 2.With RF antenna & gsm antenna; 3.With 2 groups of relay outputs products introductionThis Excellent GSM + ... working modes.Sending frequency: Support PHASE 2/2 agreement (including data business)Sending power: (2 W)/GSM900 ,(1W)/GSM1800/1900Receiving code: ... wireless door sensor,1 siren, 2 remote controllers, 1 camera, 1 GSM antenna and 1 RF antenna ,1 power supply, 1 ...