What is a Smart Watch (Smartwatch)

A smartwatch  is a computerized wristband, it has features beyond time keeping. Some smart watch can run mobile apps, play music, play videos and play Fm Radio.

These watches comes with camera, gps tracking capabilities, wifi capabilities ,cell phone, touch screen and much more.

Some of the popular brands of smart watch are:

Sony SmartWatch

OS: Android
Screen: 1.3 OLED, 128 x 128
Storage: None
Connectivity: Bluetooth 3.0
Weight: 15.5 g main unit, 26 g watchband
Battery: Undisclosed, lasts a few days with normal usage

Motorola MotoACTV

Size: 46 x 46 x 9.6 mm
Weight: 35g
Display: 1.6-inch Trasflective TFT, QCIF+ 176x220 (optimized for Indoor/Outdoor)
Supported Audio Formats: AAC, AAC+, MP3
System Memory: 256MB
Storage: 8GB capacity (16GB also available)
Connectivity: 3.5mm Headset, USB 2.0 HS
Bluetooth: Stereo Bluetooth Class 1.5
Sensors: ANT+, BLE, Accelerometer
WLAN: 802.11 b/g/n
Location: GPS+
Battery: 258 mAh
Standby Time: 325 hours
Playback Time: 20 hours
Workout Time: 10 hours indoor, 5 hours outdoor

WIMM One Watch

Product dimensions: 1.3 x 0.5 x 1.4 inches
Wifi
Bluetooth
USB Connection
Audible and Tacticle alerts
Accelerometer
Magnetometer
Bi-Modal Display
Capacitive Touch Screen
Up to 32GB memory
Splash Resistant
22G
Charges via USB or paddle

MetaWatch

Handset compatibility: iPhone 4s, iPad (3), Android (various)
Sensor compatibility: Initially, Wahoo Fitness BLE sensors for iPhone 4s
iOS compatibility: iOS 5 (basic functionality), iOS 6 (enhanced functionality)
Double injection molded PU, co-molded with PC body 
Mineral hardened glass lens with anti-glare coating 
Titanium finished stainless steel top ring 
5 ATM water resistant (you can swim with it, but no diving) 
96x96 mirror polymer network display 
Vibrating alerts 
6 buttons
Rechargeable (5-7 day battery life)
Dual Mode Bluetooth 4.0**
3 Axis accelerometer / ambient light sensor