The Yocan B-smart is a 510 threaded pen style vape battery.
It houses a 320mAh internal cell.The B-smart features a simple control dial to adjust the variable voltage output between 2.0 - 4.0V in 0.1V increments, and the responsive firing button is surrounded by a multicolor LED indicator light.
Press the button rapidly 5 times to turn the device on or off, hold to deliver power to the atomizer (>1.0ohms), or double click to initiate a 10 second preheat mode that softens extracts and prevents dry hits.

Features:

Dimensions: 86mm x 11mm
Battery Capacity: 320mAh
Spring Loaded 510 Power Connection
4 airflow channels
eGo charging
Bottom Side Variable Voltage Control Dial: 2.0 - 4.0V
0.1V increments
Single Operating Button
5 clicks: on/off
Double click: 10 second preheat mode
Press: fire atomizer (>1.0ohm)
Multicolor LED Indicator