Lentenda Mini Global Real Time GSM/GPRS Tracking Tool Power on: open the back cover, put the SIM card into the seats, then it is automatically power on. When booting, indicator will light for 10 seconds, after the indicator is off, cover the back cover then it can be used. Sound control dialing: use mobile phones or fixed-line to get through SIM card number in the alarm, hang up the machine when hearing the sound of the machine about 3 seconds, and that means it sets up successfully. When there is a sound above 45 db within 10 miters around the alarm, the call will be automatically make call number which you set before. Send 0000 SMS to turn off sound control function. Send 1111 SMS to turn on sound control function. LBS positioning: please directly edit capital lettersDW SMS to the alarm in China, and on aboard please edit capital letters GPSto the alarm,The alarm will revert a message including the information about addresses/longitude and latitude/web site content in a minute. SOS Emergency call: Edit the content of messages capital lettersSOSto alarm, directly press the key SOS above three seconds after the success of seting, the alarm will directly call the seting number. And the indicator will flash.