Product guide

Timeguard Suretime STBT4 2-Hour Electronic Boost Timer, 13A

Hour: The Timeguard Suretime STBT4 is an electronic boost timer for fixed appliances, with four selectable run times and LED countdown indication. It is designed for short, manually started boosts rather than clock-based schedules, and installation by a qualified electrician is recommended.

At a glance

Choose a quarter, half, one or two-hour boost with repeated presses of one button. The timer switches off automatically when the selected period ends.
LEDs indicate the selected duration and count down as they go out. The next LED flashes when less than two minutes remain on that stage.
The boost can be adjusted during the first 15 seconds or cancelled with a press at any time afterwards.
The listing specifies a 13A resistive-load rating and separate lower limits for several lighting types.

Price

£16.78Save 15%

Reference price: ~~£19.75~~

Price checked: 12 Nov 2026

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Often bought together

Timeguard FST24 24 Hour Digital Fused Spur Timer with Boost, 13A 3kW, Battery Backup, White

£26.13

Pros and cons

Pros

Four straightforward boost choices cover short periods through to two hours without setting a clock or schedule.
A visible LED countdown helps indicate how much of the selected boost remains.
Automatic shut-off and one-press cancellation are useful when controlling a fixed appliance such as an immersion heater or towel rail.

Cons

It offers one-off boost timing rather than clock-based or programmed schedules.

Technical specifications

18 specifications

Identity
Brand	Timeguard
Model	STBT4

Timer and load
Boost settings	4
Selectable boost times	¼, ½, 1 or 2 hours
Maximum stated resistive load	13A (3kW)
Filament or halogen lighting load	1000W
Fluorescent lighting load	500W
Low-energy lighting load	100W
LED lighting load	80W

Dimensions and installation
Dimensions listed	3D x 8.5W x 8.5H centimetres
Weight listed	0.14 Kilograms
Faceplate size	85 x 85mm
Minimum back-box depth	25mm

Materials and protection
Material listed	Plastic
Colour	White
Circuit protection requirement	up to 13A
Lighting restriction	Not suitable for use with discharge lighting.

Warranty
Manufacturer warranty description	2 year.

What to know before buying

This is an unfused unit and must be installed on a circuit protected by a suitable fuse or breaker of up to 13A. A qualified electrician is recommended, and the unit is not suitable for discharge lighting.
The listing describes the dimensions once as “3D x 8.5W x 8.5H centimetres” and separately gives an 85 x 85mm faceplate. The faceplate figure is not a complete replacement for the dimension listing, so confirm the physical fit and required back-box depth before installation. The listing also claims adjustment within the first 15 seconds and cancellation after that, alongside repeated-button selection, without explaining the exact button sequence.

Who is it for?

A good fit for

People who need a manually started, timed boost for a fixed appliance such as an immersion heater, towel rail or panel heater.
Buyers who want a simple countdown and automatic shut-off rather than a programmable daily timer.

Less suited to

Those seeking scheduled on/off times or recurring programmes.
Those using discharge lighting or who cannot provide suitable circuit protection and professional installation.

Customer reviews on Amazon

4.5 / 5 · 120 ratings

5 stars74%74%
4 stars14%14%
3 stars6%6%
2 stars2%2%
1 star4%4%

Customer feedback describes the timer as easy to use and fit, with some customers appreciating its perceived money-saving benefit. Brightness is a mixed point: the blue LED is considered quite bright at night by some, while others also describe it as too bright. That matters if the timer is installed in a bedroom or another dark room. The supplied overall rating is favourable, but ratings alone do not establish why individual customers responded as they did.

Positive themes

Customers describe it as easy to use and simple to fit.
Some customers appreciate it as a money saver.

Mixed feedback

Customers report mixed views of the blue LED brightness at night.

Frequently asked questions

Which boost times can the STBT4 select?

The listing specifies ¼, ½, 1 or 2 hours, selected by pressing the button repeatedly.

Does it switch the appliance off automatically?

Yes. The listing says the unit switches off when the selected boost ends. It can also be cancelled with a press after the initial 15-second adjustment period.

What installation requirements are stated?

It is an unfused unit and must be installed on a circuit protected by a suitable fuse or breaker of up to 13A. Installation by a qualified electrician is recommended.

Can it be used with discharge lighting?

No. The listing explicitly says it is not suitable for discharge lighting.