Does this timer make a loud noise when the timer is up? can i set the timer to vibrate? i want to use it in my office so i want a quiet timer

Dear customer, Thank you for your interest and inquiry. The product you inquired, mooas Multi Cube Timer, makes a beep noise when the time is up while using the timer function. Please note that there is no vibration function in this product. If you prefer a quiet timer for your office, we would like to recommend "Mooas Study Timer". 'Mooas Study Timer" has 4 alarm types including sound, vibration and backlight only alarm. You can purchase this item by visiting Mooas Store page or by typing "mooas study timer" on Amazon homepage. We hope this answer helps with your inquiry. If you have additional questions, please let us know. We will be more than happy to help you, Thank you! Sincerely, Mooas Inc.

I can’t figure out how to open the battery cover. Was it difficult for anyone else?

Dear customer, Thank you for your inquiry. We understand that you would like to know how to open the battery cover. To open the battery cover, locate the cover on the bottom side on the back. Then, pull the cover upwards to open. We hope this is helpful for your inquiry. If you have additional questions about the product, please let us know. We will be more than happy to help you. Thank you! Sincerely, Mooas Inc.

Are you able to change the timer to any set time you want and not just the 10 min, 20 min and 30 min shown here?

Dear customer, Thank you for your inquiry. We understand that you would like to know if times other than the time written on each side of the cube can be set. In regards to your inquiry, we would like to let you know that only the time written on the cube can be set. For "mooas Multi Cube Timer (Violet)", the supported times are 5/10/20/30 minutes. If you are looking for different set of time, we would like to recommend you "mooas Multi Cube Timer (White)". The supported times in "mooas Multi Cube Timer (White)" are 5/15/30/60 minutes. You can check out "mooas Multi Cube Timer (White)" in the link below. > mooas Multi Cube Timer (White) https://www.amazon.com/dp/B083W8BLMS?ref=myi_title_dp If you would like to set customized time, please check out "mooas Dial Cooking Timer" or "mooas LED Digital Cooking Timer TC2". You can check out these products by typing the product name above on Amazon homepage or on mooas store page. If you have additional questions about our products, please let us know. We will be more than happy to help you. Thank you! Sincerely, Mooas Inc.

Is there a light that stays on while the timer is on?

Dear customer, Thank you for your inquiry. While the timer is in use, the LED light blinks and the LCD displays the remaining time. We hope this is helpful for your inquiry. If you have additional questions, please let us know. We will be more than happy to help you. Thank you! Sincerely, Mooas Inc.