Feature: Specification: Model: SP01 Connection: BT5.0 System: Android 5.0 and above, iOS 9.0 and above Handwriting resolution accuracy: 1/600 inch Focal length: no fixed value Image frame rate: 80HZ Writing speed: 20cm/Sec Writing angle: 360 degrees Indicator light: blue and red dual-color indicator light Built-in lithium battery: rechargeable polymer lithium battery 3.7V, 250mAh Charging power supply: DC 5.0V Charging time: about 2 hours Usage time: about 8 hours Digital pen size: 164mm (including pen cap) 10-inch smart dot matrix board Size: 264 x174mm Color: black Thickness: 4.5mm Weight: 186g A5 dot matrix code book Size: 227 x 146mm Cover: PU leather Paper: 100g off-white Dalin paper Package List: 1 x Digital Pen 1 x A5 PU Notebook 1 x 10inch Writing Pad 1 x Data Cable 20 x B5 Paper 1 x User Manual 3 x Ballpoint Pen Refill 2 x Plastic Pen Refill