Fangrui Product Details Type: P11-5a Magnetic Induction Digital Electronic Counter Instruction Five-digit Big Lcd, Super Low Power Consumption, Large And Clear Indication Press Counting/pause Key (pause) To Stop Counting, After 0-30 Sec,lcd Indication Will Be Automatically Off And In Standby State. Press The Counting/pause Key Again To Turn On The Indication And Continue To Count. Use Magnetic Induction, Easy To Install And Precise Counting Maximum Counting Speed: 20 Times Per Second Reset: Through Pressing The Reset Buttons On Board Or Exterior Use The Common 5th Battery, Free From External Power Supply Anti-vibration, Efficiently Ensure The Stable And Reliable System Operation Free From Mechanical Abrasion, Safe Work, Long Lifespan Power: 1.5v-aa 5th Battery Reset Modes: Board/exterior Counting Range: 0---99999 Available Ambient Temperature: -5-40 Celsius Minimum Counting Pw: 10ms Distance Within The Magnetic Induction: About 5-10 Mm Distance Out Of The Magnetic Induction: 30mm Battery Installation: Make Sure The Battery Is