Plugs directly onto your USB, or will work with the M401 car charger in your car! Save your batteries for when you are out.
Chose from 3 different colors.

320mAh Rechargeable battery inside (NO LED)
The battery has no cutoff time. It works until the switch is released!
Works unplugged if it is fully charged!

Length:125cm

USB Passthrough for the 510 - This is a constant power source when plugged in. It also charges and will work as an unplugged manual 510. Excellent battery life! Will stay charged almost all day!