Features: 1. Root canal apex finder 2. Wide color LCD screen, operation simple and friendly interface 3. Fifth generation multi-frequency design for wet or dry accuracy, adjustment-free 4. Accurate current-stabilized generate technology, exact result of pulp vitality testing 5. Progressive audio signal combined with on-screen graphics 6. Rechargeable Li-ion battery and charger 7. Charge/working status intelligent switch to avoid EMI Technical data: Adaptor voltage: AC100-240V, 50-60HZ Battery: 7.4V/1000mAh chargeable Li-ion battery Charge time: 3 hours Display: color LCD Screen, buzzer