Features: * brand new and high quality *Made of high quality material, durable and practical to use *Pull the battery cover and replace the battery easily *Automatically distinguish between neutral and firewire *Sound and alarm LED *Automatically select 3 types of sensitivity. (High, Medium, Low) *Professional non-contact AC voltage detector *Voltage sensitivity is 12 V to 1000 V AC *AC voltage sensitivity is adjustable *Sound and light indication *Automatic shut-down *Safe, professional and easy to use *Small and compact pen for easy transportation Specification: *Voltage Sensitivity: 12 V AC to 1000 V *Frequency: 50-60Hz *Alarm Mode: Sound And Light *Flash: White(As pictures show) *Power Automatically Turns Off: Yes *Working Temperature: 32~122℉ (0-50degree Celsius) * Storage Temperature: -4 to 140 & #8457; (-20 to 60 & #8451;) *Battery: 2x1.5V AAA Battery (Not Included) *Size: 15x2.6x2.4 cm(Approx.) *Optional Color: Yellow, Black, Red (As pictures show) *Quantity: 1 Package Contents: 1 * Voltage Tensioner Voltage Pen Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data. brand new and high quality Made of high quality material, durable and practical to use Pull the battery cover and replace the battery easily Automatically distinguish between neutral and firewire Sound and alarm LED