How to set time: First, turn clockwise to the max 55-60 minutes to supply enough mechanical clockwork power, and then turn counterclockwise to set the desired time. 100% brand new and high quality. Materials: ABS + Metal Cartoon Marine Model Kitchen Mechanical timer. This is mechanical timer, please allow 1-2 minutes deviation. Timer goes up to 55-60 minutes. Mechanical, no need for batteries. Size: 6.8cm x 7.7cm (Diameter x Height) Color: Rose, Dark Blue, Light Blue, Yellow. Made in China Package include: 4pcs set Mechanical Timer 1 x Dark Blue Mechanical Timer 1 x Light Blue Mechanical Timer 1 x Rose Mechanical Timer 1 x Yellow Mechanical Timer Additional Details ------------------------------ Product description: How to set time: First, turn clockwise to the max 55-60 minutes to supply enough mechanical clockwork power, and then turn counterclockwise to set the desired time. 100% brand new and high quality. Materials: ABS + Metal Cartoon Marine Model Kitchen Mechanical timer. This is mechanical timer, please allow 1-2 minutes deviation. Timer goes up to 55-60 minutes. Mechanical, no need for batteries. Size: 6.8cm x 7.7cm (Diameter x Height) Color: Rose, Dark Blue, Light Blue, Yellow. Made in China Package include: 4pcs set Mechanical Timer 1 x Dark Blue Mechanical Timer 1 x Light Blue Mechanical Timer 1 x Rose Mechanical Timer 1 x Yellow Mechanical Timer