Wide voltage input 100-240V AC, suit for all country. Adjustable stretch length 100-400mm. Window small as 470mm is suitable. , for more than 10000 times open & close. high-quality material-made double layer chain, operate smoothly. Two flame resistance ABS holders and the POM sliding guide make the motor more silent and . Easy to install and take down. Working voltage: 100-240V AC Specification size: 460mm x 42mm x 55mm Push/Pull Force: 250N Power:28W Color: As Shown Material: Metal+Plastic Package Contents: 1 * Window Opener 1 * Switch Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.