... alarm security system, customized frequency, function up to customer. Product Appearance :Item : wirelss remote controlBattery Model : 27A Voltage : 12V Material: Zinc Alloy ... ,such asASK ,OOK modulate mode remote ,gate opener,car cental system and so on .Encoder model : HCS301,HCS201,HCS200,HCS500,HCS300 ... Details : within 15 days Wireless remote control for car alarm system