Note: Manual measurement has an error of 1?3cm. specification: Item Type: Heated Neck Wrap_x000D_Material: PC+PU leather_x000D_Product Size: _x000D_Minimum Adjustment: Approx. 21cm / 8.27in _x000D_Maximum Adjustment: Approx. 25cm / 9.84in _x000D_Characteristic: Heat the neck compress and adjust the height of the neck brace Features: 1Neck Fixation: Make full use of the lifting buttons on both sides to rotate the lifting device forward or backward to achieve the effect of traction and fixation of the neck. 23 Gears Temperature Adjustment: The back neck can be heated to better relieve neck soreness, and the back neck brace can also be adjusted up and down to accurately apply heat to the neck. 3Adjustable Height and Tightness: The two front knobs of Cervical collar can adjust the height of the neck support, and the back knob can adjust the tightness. 4Relieve Muscle Pain: The neck sleeve is used for heating treatment to help relieve neck pain and fatigue, and relax tense muscles. 5Neck Fitting: The back neck position knob can adjust the tightness of the neck to better fit the neck, so that the neck support effect is better. PackageList: 1 xCervical Collar 1 x USB Cable 1 xManual