CLOCKDownload
C⁴ Clock running on a laptop beside the C⁴ logo and a Free Download badge

A stage timer built for conference AV

Explore C⁴ Clock

C⁴ Clock is a Windows stage timer for conference AV operators. Run speaker countdowns, monitor PowerPoint slides and media, and keep the run sheet on schedule.

Explore the stage timer workflow or see how the PowerPoint countdown and monitoring tools fit your show.

C⁴ Clock operator interface with countdown, presentation and media controls

NO MORE FORGETTING TO START THE CLOCK!

C4 countdown armed to start when the presenter advances through PowerPoint

SLOW DOWN OR SPEED UP A PRESENTER’S CLOCK

C⁴ Sneaky Speed Adjustment showing a target finish and the required countdown speed

Notes Output Mode

C⁴ Notes Output Mode showing a countdown, slide number, and large automatically scaled presenter notes
Presenter notes / Output mode

Give presenters a larger notes view on their DSMs. Notes can automatically scale to fit the display, or scroll with the C⁴ Puck’s tactile hardware scroller.

Explore the C⁴ Puck

CustomC⁴PPT Add-in

C⁴ / PowerPoint integration

The C4 PPT Add-in not only connects and sends slide info to the C4 clock, it can also be used as a stand-alone tool to quickly find videos, audio and other media to check before show time. It’s the perfect speaker prep tool.

C⁴ PowerPoint add-in showing media counts, the slides containing media and preflight status
C4 PowerPoint add-in control for jumping to the next slide that contains media

FREEZE LAST SLIDE — CONTROL IT FROM C⁴ MID-SHOW

Freeze last slide snowflake toggle on a connected C⁴ PowerPoint source

Toggle Freeze last slide from the connected PowerPoint source in C⁴. The final slide’s builds still play; after its last build, supported forward keyboard and clicker inputs are blocked. Backward navigation and Esc remain available.

C⁴Runsheet

C⁴ run sheet import preview with presenter names, start times and durations
A Client run sheet tells you when the break is supposed to happen. C⁴ tells you when you are actually getting there.

AUTO LOAD POWERPOINTS IN ORDER

See the one-button handover in action.

Finally, a stage timer that does more than count.

Import your run sheet and link each presenter’s PowerPoints. Then one press of LOAD NEXT handles the handover.

  1. Loads the presenter’s timerTheir run-sheet duration, ready to start.
  2. Opens their main PowerPointLaunches straight into slideshow on slide 1.
  3. Opens the backup tooIf linked, the backup PowerPoint opens in slideshow as well.

Arm automatic start: the clock begins when they advance to slide 2.

Available in C⁴ Pro and an active Pro trial. AUTO LOAD PPT must be on.

Setup & requirements →

Give the client their own dashboard

How much time is left?How many slides have they got to go?How far ahead or behind are we?

Stop answering the same timing questions all day.

Give clients their own live dashboard on a laptop, iPad or phone. They can see the countdown, slides remaining, presenter pace and whether the session is running ahead or behind.

Live run sheet showing session status ten minutes behind

Let them update the times too

With permission, clients can adjust presenter, Q&A, panel or session times themselves — without coming back to the operator for every change.

You stay on the show. They manage the schedule.

A dedicated Audio op view

A dedicated view for audio

Give your audio operator their own page with just the information they need: upcoming audio cues, mic assignments, Shure wireless battery and RF signal status, and who’s next on the run sheet.

C⁴ audio operator dashboard showing the countdown, PowerPoint media timing, Shure microphone battery and RF status, and run sheet microphone assignments

Control it all from a Stream Deck

Stream Deck XL graphic showing Companion support for C⁴ timing and presentation controls
Companion support

Full Companion support for timer, PowerPoint and session controls — right from your Stream Deck. Control timers, presets, PowerPoint, slide status, session timing and show functions from one familiar surface.

Optional hardware

C⁴ Puck

Keep your presentation notes moving without reaching for your laptop’s arrow keys or a fiddly mouse that can lose focus. The C⁴ Puck connects to C⁴ Clock and lets you scroll PowerPoint Presenter View notes directly with its tactile wheel, while keeping your countdown and slide progress close at hand.

A presenter holding the C⁴ Puck, showing a live countdown and slide progress

Essential show information, close at hand

The C⁴ Puck puts essential presentation information on a compact, round touchscreen you can keep close at hand. It connects to a compatible C⁴ Clock setup over Wi-Fi or USB, giving presenters and show teams a glanceable view of what’s happening now and what’s coming next.

Each C⁴ Puck comes with a free included PRO license.

A quick look around the Puck menus.
The C⁴ Puck showing presenter, operator, organiser and show caller views, plus a presenter message

Choose the view that suits your role

  • PresenterCheck the countdown and slide progress, and scroll presentation notes from the Puck.
  • OperatorKeep an eye on show status, slide position, media cues and scroll notes.
  • OrganiserView run-sheet pace, presenter timings and session outlook.
  • Show CallerFollow live slide and section information alongside timing and media status.

Stay alert without watching the screen

The Puck can display useful C⁴ Clock alerts, including upcoming-media cues and presenter messages. Haptic alerts help draw attention to important moments without requiring you to watch the screen continuously.

Available now
The C⁴ Puck displaying a video-on-next-slide warning above a live countdown

The C⁴ Puck works as a companion to C⁴ Clock; it is not a standalone presentation timer. Features and displayed information depend on the connected C⁴ Clock setup.

C4 Clock is Compatible with Ulanzi Pixel Clock

Ulanzi Pixel Clock displaying a red time-up message and a green countdown
Pixel Clock compatibility

Display C⁴ countdowns and messages on the clock. 10-hour battery life supports portable use.

View the Ulanzi Pixel Clock

Free vs Pro

Choose the C⁴ setup that fits your show.

One-time payment
Feature comparison of C⁴ Free and C⁴ Pro
FeatureC⁴ FreeGreat for simple shows and solo operators.C⁴ ProDeeper PowerPoint workflow and run sheet & client remote control.
Countdown timer controls✓✓
Quick presets, custom duration & end time✓✓
Windowed or borderless output✓✓
Web countdown + notes view✓✓
Companion support✓✓
PowerPoint connections1 PPT sourceUp to 4 PPT sources
Freeze last slide✓✓
PowerPoint auto slideshow loading—✓
Slide count + slides left✓✓
Media duration countdown✓✓
Pre-show & live PowerPoint warnings—✓
Smart Run Sheet import—✓
Client live run sheet dashboard—✓
Web control—✓
Audio operator dashboard—✓
Wireless microphone monitoring—✓
Client timing adjustments—✓
Free downloadTry Pro free for 30 days
Go Pro

C⁴ Pro includes 3 machine activations. Need more? Company Pro is available for larger teams.

DownloadC⁴Free

Windows download

Install C⁴ Free for Windows and test it with a real conference workflow.

Download for Windows Docs