Spy Calculator Recorder (Voice Activated)

A compact spy calculator is something that will never look out of place left on the desk at the office, at home or as an everyday object to produce in-hand at meetings or similar occasions.

Fully Functional Desktop Calculator

Maintaining the standard functionality of the calculator is of absolute importance, ensuring the outward appearance of the device remains completely uncompromised. Installing the recording system inside this spy calculator has no detrimental effect on either its appearance or its daily operation. Built using a genuine 10-digit desktop donor unit, it offers full mathematical functionality alongside an integrated solar panel to power normal calculations. Compact and lightweight, the device is easy to carry in a bag or briefcase, ready for swift deployment whenever required.

Voice Activated Recording – Exceptional Battery Life

A highly sensitive microphone is discreetly positioned inside the **spy calculator**, receiving audio through an ultra-fine 1mm pinhole on the side. This provides a clear listening radius of up to 10 metres in standard room conditions. Powered by an independent internal lithium battery, the **spy calculator** delivers up to 75 days of standby time or over 72 hours of continuous recording on a single charge. Because the recording module operates on sound activation, battery life is optimised based on room activity allowing the spy calculator to remain deployed for several weeks in environments with occasional daily noise before needing a recharge.

Large Memory Capacity – Auto File Storage

Audio recordings captured by the spy calculator are automatically saved to an internal flash memory system with a capacity of up to 288 hours. Each time the voice-activated system detects sound, it logs the event as a separate audio file, making reviewing and navigating specific incidents quick and simple. The internal memory can store up to 9,999 individual audio files. Recording initiates the moment sound is detected and automatically saves and pauses when silence continues for over one minute.

Time/Date Stamp – Adjustable Sensitivity & Quality

This updated voice recording calculator features accurate time and date stamping on every recorded file, making it easy to confirm exactly when an event took place. Using the configuration software stored on the internal memory, you can adjust the microphone sensitivity to match your environment. You can also increase the recording quality settings, which alters total memory storage from 288 hours to 144 hours. Note that the product records all ambient sounds equally, capturing human voices, television audio, or background noise within range.

Very Discreet Design and Operation

The recording system is activated via a hidden pin-operated switch accessible on the exterior casing using the supplied tool. During activation and voice-triggered recording, the unit remains completely silent with zero indicator lights or electronic feedback. To recharge the battery or offload recorded files, simply remove four screws on the rear of the casing using the supplied screwdriver. Accessing the internal USB port takes just minutes, ensuring the outer body of the spy calculator stays free of obvious external ports and preserves complete cover during use.

Is the spy calculator silent and discreet in operation?

Yes. The internal recorder is completely digital with no moving parts, clicking sounds, or audible alerts that could draw attention while active.

Are there any lights that indicate the device is recording?

No, there are no external indicator LEDs or visual signs whatsoever to show that audio recording is taking place.

Do the recordings have a time and date stamp?

Yes. Every time the voice-activated system initiates a new audio recording, a precise time and date reference is embedded directly into the file name for easy tracking.

Will the recorder still capture sound if it is hidden from view?

Although the spy calculator is designed to sit openly on a desk without drawing suspicion, it will still pick up surrounding audio if concealed. However, heavily covering or burying the unit may reduce microphone range.

How can the recordings be played back?

Recordings can be played back using standard media software by unscrewing the housing and connecting the internal module to a PC or Mac via the supplied USB cable. No proprietary software is required.

Can the voice activation feature be switched off?

No. The unit is permanently preset to voice-activated (VOX) recording mode to maximise battery life and storage efficiency. There is no continuous recording override.

Does the device record one continuous file or multiple separate files?

The recorder generates a fresh audio file each time sound triggers the microphone, automatically saving and closing that file once the surrounding environment becomes silent.

Will the spy calculator still perform standard math calculations?

Yes. The standard desktop functionality of the calculator is 100% preserved, operating exactly like the original donor unit for everyday use.

• A small cross-head (Phillips) screwdriver is required to open the calculator housing and access the internal USB charging and offload port.
• A Windows PC or Mac computer equipped with working speakers or headphones is needed to listen to your recorded files.
• A standard media player capable of playing MP3 files is required. We recommend downloading the free VLC Media Player for seamless audio playback.

• Functions as a fully operational desktop calculator while housing a completely independent covert audio recorder.
• Sound-triggered system ensures the spy calculator only records when audio is detected, preserving both memory and battery life.
• Internal high-capacity lithium battery provides up to 75 days of continuous voice-activated standby operation.
• Saves each sound-detected incident as an individual audio file, making reviewing specific events fast and straightforward.
• Stamps every recorded audio file with precise time and date information for accurate evidentiary tracking.
• Onboard software allows customization of microphone sensitivity and audio quality to suit different room environments.
• Completely silent in operation with zero visible LEDs, warning tones, or electronic feedback during recording.
• Activated via a discreet pin-hole switch on the exterior casing using the supplied tool, eliminating obvious external switches.

• Donor Unit: Canon 10-Digit Desktop Calculator
• Power Supply (Recorder): Internal rechargeable lithium-polymer battery
• Power Supply (Calculator): Solar panel with internal battery backup
• Standby Battery Life: Up to 75 days in Voice-Activation Mode
• Continuous Recording Battery Life: Up to 72 hours continuous recording
• Recharge Time: Approximately 4 hours via USB connection
• Internal Memory Capacity: 8 GB high-speed flash storage (up to 288 hours of audio)
• Audio File Format: MP3 (64 kbps default bitrate)
• Microphone Pickup Radius: Up to 8 to 10 metres
• File Storage Limit: Catalogues up to 9,999 individual audio files
• Dimensions: 145 mm × 100 mm × 33.5 mm
• Operating System Compatibility: Windows systems up to snd including 10, and 11 and Mac OS (Time/date utility requires Windows)

• Fully Functional Spy Calculator (with Internal Voice Recorder)
• USB Charging and Data Transfer Cable
• Pin Switching Tool (for On/Off Activation)
• Mini Precision Cross-Head (Phillips) Screwdriver
• UK USB Mains Charger Plug
• Detailed English Instruction Manual
• Support by email and phone if needed