How To install it ?

1). Just use a line to tie it on the buttom Quadropter body ,then can use it
2). also when you connect it ,you must according the picture from our website .use white plug connect to the alarm ,when you first connect it ,will hear a "didi alarm" Sound.
3). also this alarm can adjust the voltage ,you can adjust the voltage by the instruction on the alarm (instruction is on the back side of the alarm)

Also very important ,usually the battery has two plug for 7.4v battery ,the white plug is the charge plug ,you can put it on the alarm like this picture ,when connect it ,will hear a ""bibi" sound.