Features: 1Improve of Writing Posture: Writing tools can improve children's writing skills and posture, so that you form a standard writing posture, reduce long term writing discomfort for you, prevent finger deformation 2Ergonomic Design: Ergonomic design of writing tools, so that children in writing comfortable, clear, at the same time, reduce muscle strain. No more red and calloused fingers from writing 3ABS Material: ABS material is used. Impact resistant, comfortable writing tools, bring you excellent pen holding experience 4Warning Light Design: When there is a mistake in posture, the red warning light will blink to ensure that we correct our writing posture in the first time 5Excellent Gift: With consistent long term use, you will be able to develop good writing habits. Can be given to children as gifts for Thanksgiving and ChristmasItem type: Handwriting Writing Aid ToolsWeight: Approx. 23g / 0.8ozMaterial: ABSLength :150mm / 5.9inWidth :16mm / 0.6inBuilt in Battery: 1 CR 927 Button Battery 100mah (Included)Indicator Control: Built in Balance Sensor1 x Handwriting Writing Aid Tool1 x Instruction Manual