Welcome We are OPENCAST

"Open the door, Close business"

Design - Development - Production - Service

We are specilized in the ICT industry. Such as Telecom, Multimedia, TV & Radio Broadcasting, Healthcare and IoT fields. Headquarters are in Seongnam city, Gyeonggi-do, Republic of Korea.




인터넷 방송, 크로스페이더, 에코

윈도우 10, 안드로이드 호환


스마트와치 G1-style

Smart Watch MODEL#L08S

G1-style 스마트와치




JeongSeon Arirang

강원도 무형문화재 제1호

정선아리랑 음원 듣기



highway cctv and music

24h Stream Stick with us

Free listen


We, opencast have an intensive background and experienced in the ICT industry since startup. Such as Telecom, Multimedia, TV & Radio Broadcasting, Healthcare and IoT fields. Headquarters are in Seongnam city, Gyeonggi-do, Republic of Korea.


David Y.W YOON

CEO & Founder

Performing pro-basic



Dae Sung Jang

CMO Director

Radio DJ, Jang's HIGHWAY



Jeong Sun Lee

CCO Communication

TV & Radio announcer



Do Eun GOO

CMO Sales & Marketing

Korea Total Beauty Research


Brief History

• 2005 USB 오디오 디제이믹스 시작
• 2008 유투브 채널 개설
• 2010 정선아리랑 음원 아카이브
• 2016 아리랑교통방송 시작
• 2021 제36회 서울국제관광박람회 중계.촬영
• 2022 와치빌더® 스마트와치 및 서비스 개발

Business hour

UTC South Korea - Seoul

Monday - Friday (9.00 AM - 5.00 PM)
Call us (031)752 4367
International +82.(0)10.2656.4367


RM#B04, 8-4, Balibongnam-ro 25beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea 13601

WatchBuilder System

Smartwatch Tracking and Monitoring System

The WatchBuilder is a comprehensive device and wearer management system that allows communication to many devices via our gateways. We also provide integration to third party systems and call centers to facilitate services in our focus pillars (elderly, disability and personal safety)

1. WatchBuilder® is a virtual assistance that offers connected objects, personalized services, listening and above all a stronger bond with your family and loved ones.
2. WatchBuilder® is a total security tracking software fully managed and hosted servers, with guaranteed 99% uptime. We can better serve you upon your request.


Fully licensed software for:
• Personal safety monitoring and protection
• Real time tracking monitoring and management
• Healthy monitoring and management

Supported components:
• Fully your own brand and logo
• Admin Management center
• Agency Management center
• Billing/recurring invoicing system
• Open API to integrate in your CRM/ERP
• End user console
• mobile Web/App

Core Features

Support multiple device protocols. Accomodate most of the main current trackers from difference suppliers(Happy to add more devices as required)

• Global coverage cloudy server
• Seperate Admin/Agent/End User Login
• Realtime tracking with historical play back for up to 120 days
• Remote control features such as restore, remotely reboot, shutdown...
• Circle, retangel, polygon geofence in/out alarming
• Email Notification on alarming(Support add SMS features as required)
• Blood pressure, Blood oxygen , Heart rate, Pedometer, Sleep time monitor and remind
• Billing system and payment account
• Open API for integrate in third party system
• Customizable mobile(iOS and Android) app for tracking
• Customized reporting modules(Happy to add more as required)
• Multilingual languages(Happy to add addtional language as required)

Get peace of mind with Senior Smart Watches

If you need a senior smart watch for your family or friends, you are at the right place. Our smart watches range comes with the option of personal alarms, allowing you to have complete control over the situation in case a medical emergency arise. Senior smart watches enable elderly people to stay independent and offer peace of mind to the family. The watches are extremely lightweight and portable.


SOS Activating, How do they work?

How to triggering? just press SOS button & hold it then the watch activating SOS mode in 3 seconds automatically


Lone worker support

Employers have the responsibility to provide a safe working environment for their employees. Of course, this also includes lone workers who might spend extended amounts of time off site and alone thus exposed to more risks around personal safety. Whether your employees are regularly in situations where exposure to violence or confrontation is high or you are trying to implement preventative measures for your traveling workforce, we are here to help.

G1-style Senior Smartwatch

Why? G1-style SmartWatch

This senior watch combines 24hours heart rate monitor, blood pressure monitor, sedentary reminder, SOS, two-way phonew calls, GPS tracking features together, keeps your loved are always connected, and you can well know more about their health anytime and anywhere. You can rest easy knowing that you, along with all their other pre-approved emergency contacts, will be alerted via an SOS button if your senior loved one needs assistance.

We do for your health & safety life

We're a passionate team dedicated to developing tracking technology products that help improve people's lives. While keeping track of al the things which keep your life moving can be stressful, we feel it doesn't have to be. We believe you can live stress free, save time and money and feel empowered along the way.


3G WCDMA/4G LTE gps sos adult smart watch sos panic button elderly alarm system

• Fall down alarm
• Health & Location monitoring
• SOS Calling
• Waterproof

Core Features

• Display : high resolution touch LCD 1.3" 360*360
• Material : PC+ABS+Ceramics
• Battery : Lithium pollymer battery 700mA
• Operating System : RTOS Ultra high performance
• Processor : 1GHZ CPU+1G DDR RAM
• Frequency Band : GSM (900,1800), 3G WCDMA (B1,B8), 4G FDD (B1,B3,B7,B8), TDD (B38,B39,B40,B41)
• Bluetooth : BLE5.0
• SIM Card : 1 Nano SIM Card slot
• Health Sensor : Heartrate, Bloody pressure, SPO2, Body temperature
• Others : Steps Counting, GPS Positioning, 2-Way Call, SOS Alarm, GEO-fence




SmartWatch introduce and features video playlist

USB 2.0 UAC - audio mixer

USB 2.0 AUDIO CLASS, DJmix5300 audio mixer

마우스만 다룰줄 알면 사용할 수 있습니다. 별도의 설치과정이 필요하지 않아서 누구나 편리하게 컴퓨터 USB 포트에 연결만 하면 알아서 설치합니다. 이미 많은 방송 디제이분들이 사용하고 있는 디제이믹스 5300 제품은 국산 개발/제조/판매를 통하여 15년이 지나도 한결같이 사랑받는 오디오 믹서 입니다. 독일 음향전문 회사의 칩 적용으로 묵직한 사운드와 스테레오믹스 오디오 파이프라인 기술 적용으로 아날로그 감성을 위한 크로스페이더 방식의 믹싱 방법을 제공하여 특히 인터넷 방송 진행시 부드러운 음악과 멘트의 교차조절이 가능합니다.

The DJmix5300 is a comprehensive device and digitally enhanced playback & record audio mixer allows to user create audio content easily such as real time mixing PC playback sound and Microphone/or Line input signal. We also provide integration to control 8 Bits ADC corssfader. Support Standard USB plug & Play function at the Running Windows/Mac OS Desktop or Laptop PC. No required specific driver installation. We can better serve you upon your request.

Core Features

● OPENCAST Stereo mix audo pipe line thechnology inside
● Materials : Aluminium alloy and silk printed
● Power Supply : USB 5V Self-powered
● USB I/F : USB A type - Micro 5p Cable
● Audio I/F : 3.5mm JACK - 1. Headphone out, 2. Line out, 3. Microphone Input, 4. Line input
● Fader : Micriophone Gain, Line input, Echo effect, Crossfade
● Resolution : 2CH DAC 24Bit / 2CH ADC 24Bit


• 오디오 믹싱, 가라오케 라이브
• 인터넷 방송 - 음악방송 라이브 디제이(YouTube, 세이클럽, 인라이브 등)

Where to buy

온라인 주문서 작성하기
• 전화문의 031)752-4367
Domestic only Click Order form


• 대한민국 오픈캐스트 개발/제조/판매


DJMIX#5300 introduce and features video playlist

Discontinued Product User Manual

DJmix5100 설명서(pdf) 다운받기
DJmix3100 설명서(pdf) 다운받기
DJmix3000 설명서(pdf) 다운받기
DJmix2000 설명서(pdf) 다운받기
IP 라디오 영문 설명서(pdf) 다운받기