5 out of 5
Seiko DT-40 - LED Multi-Function Digital Timer
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Product Description
Manufacturer Part Number: DT-40
The SEIKO DT-40 is a compact,multi-functional timer with a wide variety of uses,such as displaying times and scores for sporting events and counting days remaining for an event. The SEIKO DT-40 features 5 ½ inch digits and can be programmed and operated on the unit itself or by its included radio frequency remote control.
11 DIFFERENT MODES INCLUDE:
The SEIKO DT-40 has dimensions of 22 x 8 x 5 and is powered by AC 100-240V. It can be displayed on table-top,hung on a wall,or displayed with the SEIKO KT-011 caster stand (sold separately).
SEIKO DT-40 - Instruction Manual
The SEIKO DT-40 is a compact,multi-functional timer with a wide variety of uses,such as displaying times and scores for sporting events and counting days remaining for an event. The SEIKO DT-40 features 5 ½ inch digits and can be programmed and operated on the unit itself or by its included radio frequency remote control.
11 DIFFERENT MODES INCLUDE:
- Countdown Timer - preset up to 99 minutes,59 seconds and counts down in full or 1/10 seconds
- Count-up Timer - counts up to 99 minutes,59 seconds in full or 1/10 seconds
- Stopwatch - with lap or cumulative splitS
- Segment Timer - set up to 9 different countdown settings with ability to repeat 99 times
- Clock - 12 or 24 hour display with 5 distinct alarm settings
- Score - 2 team scores up to 99 with game/sets won up to 9 each
- Game Mode (Countdown) - switch the display between countdown time and score
- Game Mode (Count-Up) - switch the display between count-up time and score
- Tennis - with points,games won,serve and tie-break point
- 4 Digit Numerical Display - display any four digit number from 0 to 9999
- Remaining Date Display - counts down days remaining to event from up to 9998 days away
The SEIKO DT-40 has dimensions of 22 x 8 x 5 and is powered by AC 100-240V. It can be displayed on table-top,hung on a wall,or displayed with the SEIKO KT-011 caster stand (sold separately).
SEIKO DT-40 - Instruction Manual
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By MustangWay
Date: December 13, 2025
Very good casual watch. Keeps good time. Instructions are available at Seiko.com. You will need the case to find the manual of instructions.
Rating: 
[4 of 5 Stars!]
[4 of 5 Stars!]
By Bruce Neuman
Date: December 05, 2025
On first blush, watch is attractive and was easy to set. The band on this model is patent leather and leaves a lot to be desired. The reported accuracy for this model is not great but time will tell.
Rating: [4 of 5 Stars!]
[4 of 5 Stars!]
By ChrisHeadster
Date: October 27, 2025
The brown leather band had come with cannot accommodate an Eight inch wrist. It's too tight even on the last hole
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Brian D
Date: October 12, 2025
Beautiful watch, very happy with the purchase. It runs very well with it.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By R
Date: September 09, 2025
It barely holds power reserve! Also the blue color tone of the image is way different than the actual color you get. Retuned.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By A Customer
Date: September 03, 2025
Watch
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]