Linktop HC-21 User manual

File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 1 of 17
Electronic Stethoscope
(Model: HC-21)
Xiamen Linktop Technology Co., Ltd.
User Manual
(Version: A/0)

File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 2 of 17
Foreword
This manual is a part of a medical product - the Electronic Stethoscope.
Linktop bears no liability and provides no guarantee with regard to damage (including indirect
damage) arising due to this user manual not being complied with.
Prior to using the medical product, it is required to read this user manual carefully.
The user manual should be kept in a safe place for the whole duration of using the
medical product.
It should be provided to every subsequent owner or user of this medical product.
It should be updated on the basis of every supplementation received from the product
manufacturer.
The aim of this manual is to describe a medical product – the Electronic Stethoscope – taking
into account the following in particular:
Description of the medical product,
Safety of use,
Maintenance,
Troubleshooting,
Servicing.

File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 3 of 17
1. SAFETY GUIDE
Please read the entire instruction manual before you use Electronic Stethoscope. It will give
you a better understanding of how the product works.
1.1 Warnings
Using this medical product is not a substitute for visiting a physician and may not delay
obtaining medical assistance in sudden pathological conditions.
This medical product can be operated by adults only.
Do not perform auscultation with this medical product if there are any wounds or
abrasions within the spot examined.
In the event when the user of this medical product has a pacemaker implanted, the
admissibility of using this medical product should be consulted with a physician.
The device is sensitive to external factors - noises or murmurs may have a negative
impact on the quality of recordings.
This medical product is not intended for diagnostics in emergency conditions! If you
suspect any hazard to life or health (e.g. trouble breathing, impaired consciousness,
significantly increased respiratory rate, panic), do not use this medical product! In such a
situation, contact a doctor urgently.
This medical product includes small elements that can be ingested or aspirated: keep the
product and its accessories away from children.
The power supply cable may constitute a strangulation hazard: any examination of
children should be conducted under supervision.
Only Magnetic USB cable paired with a charger provided by the manufacturer –or a
charger with parameters consistent with those specified in this manual –should be used
for charging the device.
Do not perform examinations with the stethoscope or put it to the body while it is being
charged.
Do not attempt to replace the battery on your own.
Prior to commencing examination, please disconnect the charging cable from the
stethoscope!
In case of noticing any irregularities in functioning of the stethoscope or any damage to it,
stop using it immediately and contact the manufacturer.
Prior to using the stethoscope, make sure that it has no visible damage.
The stethoscope should not be opened or modified.
The stethoscope should not be immersed in water or other liquids.
1.2 Precautions
This medical product is an electronic stethoscope. It should be used solely for recording
the respiratory system or heart auscultation sounds. This medical product does not
analyze the sounds recorded.
A recording made using this medical product may be transmitted only via applications
approved by Linktop. The recordings made using any applications other than those
specified below may not be reliable, which may lead to their content being interpreted

File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 4 of 17
incorrectly by a doctor and, in consequence, to incorrect diagnosis. The list of approved
applications is available at the www.linktop.com website.
Do not expose the product to impact of any chemical substances, sunlight, or high
temperature.
Protect the stethoscope against shocks and falls.
The product should be used in ambient temperature from 15 to 40°C.
Do not expose the stethoscope to temperatures greater than 50°C or lower than 0°C.
Do not use the product when the relative humidity exceeds 90%.
In case of noticing any irregularities in functioning of the stethoscope or any damage to it,
stop using it immediately and contact the manufacturer.
The product should be stored in a clean and dry place.
This medical product is not sterile and must not be sterilized.
The stethoscope should be charged only by means of the charging cable included in the
set supplied. In any other case, use a charger that meets the requirements described of
this manual.
When the product is being charged, all its functions, including data transmission, are
blocked.
The stethoscope does not include any parts that can be replaced by the user on their
own.
If you experience any skin irritation or redness after use this device, please stop using the
device.
1.3 Contraindications
N/A
1.4 Adverse Reactions
N/A
1.5 Special Population
N/A
1.6 Intended Use/Indications for Use
The Electronic Stethoscope is intended for the detection, amplification and recording of
sounds from the heart, lungs, anterior and posterior chest with selective frequency ranges. It
can be used on any person undergoing a physical examination.
2. DEVICE DESCRIPTION
2.1 General Description
Electronic stethoscope's proprietary environmental noise cancellation technology can help you
hear the human body's important heart and lung sounds. This technology can reduce
background noise by an average of 85%, but will not filter out important auscultation sounds.
Electronic stethoscope is compatible with both headset auscultation and Bluetooth recording
auscultation, which is convenient for doctors in clinical diagnosis or remote auscultation. The

File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 5 of 17
excellent acoustic sensitivity and high-quality sound transmission of this product provide
reliable performance and comfortable experience for medical professionals who are
committed to achieving the best patient care.
2.2 Device Drawing
Figure 1. Device Drawing
2.3 Device Components
The main elements of the stethoscope are presented on Figure 2.
Figure 2. Device Components
Description of each component
①
Power button: Power on/off and Bluetooth pairing Button.
②
Indicator light: Two color LEDs
③
PC socket: 3.5 mm mini jack socket – used for connecting PC or Mobile phone to
record
④
Charge port: Magnetic USB interface – used for charging
⑤
Headphones socket: 3.5 mm mini jack socket – used for connecting headphones
⑥
Membrane
⑦
Audio jack silicone plug – used for waterproof and dustproof of the audio jack.
The table below includes the description of the Button and LEDs on the stethoscope:
In the shutdown state, Long press the button 3 seconds to turn on
In the power-on state, Long press the button 3 seconds to power off