1. Alarm swftch: Long press the button to enter the function, short press the up button to turn on/off the alarm switch 2. Set the upper limit of temperature alarm: Press the key again to set the temperature upper limit alarm value, and press the up/down keys to adjust the alarm value 3. Set the lower limit of temperature alarm: Press the key again to set the temperature lower limit alarm value, press the up/down keys to adjust the alarm value Measurement range :-40 C~ 150 C Probe length: cord length:1.5m Instructions: Key function 1. Enter function options 2. Up key Adjust settings and options 3. Down key Adjust setting value reduction and selection The order of key function options is: 1. Alarm switch; 2. Set the upper limit of temperature alarm 3. Set the lower limit of temperature alarm Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Material: Plastic + Metal colour: As shown Package Contents: 1 x Pool Thermometer 1 x Probe() Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.