• The watch phone has existed in fictional stories since the 1950s, but Samsung only created the first concept watch phone in 1999. In 2009, LG launched the first marketed watch phone, which allows users to make and receive calls and check the time through a small gadget they wear around their wrist.
  
  

Screen

• People can keep regular cell phones in bags or pockets, but watch phones often have more exposure to elements that could cause damage. As such, watch-phone screens often have an anti-scratch layer for protection. A watch phone's screen also has to display both the time and a phone dial pad, so it usually has a digital touch screen to fit the various details and buttons in the small space.
  
  

Voice

• A user can listen to calls through the loud speaker and headset. Watch phones often have a text-to-speech feature, where the watch phone reads out the text on the screen. Some models also have microphones to support a voice-recognition feature, which allows the user to enter voice commands. Depending on the model, the user might also be able to record voices and create voice memos.
  
  

Connectivity

• A watch phone usually comes with a cable that lets the user connect it to another device such as a computer or a regular telephone. Watch phones often also connect wirelessly to a headset or to other devices via Bluetooth. Some models can connect to the Internet so the user can check their emails while on the go.
  
  

Entertainment

• A watch phone often has a camera for taking pictures and making video calls. Some models also function as a music player that plays MP3 files through a loud speaker or a headset and a video player that displays MP4 videos on the screen. The user can usually store music and video files on the watch phone.