Color: Black - Quantity: 1 - GSM frequency: 850MHz / 900MHz / 1800MHz / 1900MHz - Input: AC 110~220V 50 / 60Hz - Output: DC 5V 300~400mA - SOS emergency call: Edit the content of messages capital letters "SOS" to alarm directly press the key SOS above three seconds after the success of setting the alarm will directly all the setting numberand the indicator will flash - Built-in 3.7V 500mAh charging battery - Standby time: When using sound control standby 5 to 7days when not using sound control standby 12 to 15 days - Small and exquisite volume clear voice long standby duration simple operation stable performance easy installation - Mainly used for home monitoring; children old people pet supervision monitoring; car warehouse security tracking etc. - Packing list: - 1 x Tracker - 1 x 2-flat-pin plug adapter - 1 x USB cable (55cm)