how to remove rear view mirror

{"cid":"91200028","title":"4G OBD OBDII Wifi Fuel GPS Tracker Truck Fuel Level Monitoring Trailer Management","imgUrl":"https:\/\/img.ismap.com\/nimg\/5f\/f8\/27fb418cd99a622e269acda72524-200x200-1.jpg","attrs":{"Brand Name":"UniStrong","Model Number":"E9652-12","Minimum Order Quantity":"5","Delivery Time":"THD","Place of Origin":"China","Payment Terms":"T\/T","Supply Ability":"20000","Packaging Details":"GIFTBOX PACKAGE","Power cable":"7PIN female head\uff0c1*CAN\u30011*RS232\u3001B+\u3001B-\u3001ACC\uff0cloose wire on the other side","GPS\/BD antenna":"high precision RTK antenna","interfaces":"SI\uff2d card \/inside device\/GNSS RF SMA *1\/GPRS RF SMA *1\/7PIN male head","Sleep, wake up":"sleep status, wake up by ACC\/G-Sensor etc.","4G antenna":"Pen antenna","battery":"550mAh\/3.6V NiMH battery","Installation method":"fix by screws","working temperature":"-30\u2103--+70\u2103","storage temperature":"-40\u2103--+85\u2103"}}