Ultrasonic Visual Scaler Electric Portable Dental Scaler Tooth Cleaner 3 Modes with LED Light HD Lens APP Wireless Connection Oral Calculus Tartar Remover Dental Plaque Stain Cleaner Remove Teeth Whitening Device USB Attentions: 1.Long press to turn on/off the device 2.The device works when it touches a tough thing like teeth,if you use it on the skin,it will not work. there is no vibration of item body. 3.Please make sure accessory head was installed on device during turning on or charging. 4.It blinks while charging,and it won't shows the power(so you will see an empty battery sign but it's not empty),the blinks stop when it charges full 5.You need to unplug the charging cable before turn it on and use 6.The first charging time takes at least 3 hours 7.Only Visual Version support APP real time .APP support Android and IOS,can't windows. Specifications: Material: ABS+stainless steel Color: White Weight: 0.19kg Packing size: 20*7.3*3cm Lens pixel: 500W Number of spotlights: 6 Working frequency: 44?3KHZ Battery capacity: 550mAh Battery life time: 60min Best focal length: 2.5-3cm Lens diameter: D5.5mm Charging voltage: DC5.0V/1A Maximum power: 8W Charging time: about 2-3 hours Use time: about 1 hour Charging port: Type-C charging port Packing List: 1* Host 1* Small wrench 1* Pointed 1* Flat head 1* USB Charging Cable 1* English User Manual