This is the ElectriFly 3A BEC for 2S - 6S LiPo Batteries.

Features

Designed to power the receiver in a model airplane in two different
configurations-
Primary intended use is as a 3 amp voltage regulator by plugging the
receiver LiPo battery into the Deans connector on the BEC and then
into the battery channel on receiver
Can also be used in a three-way connection with the ESC/LiPo to
eliminate the need to add a battery for the receiver, Parallel
Deans Connector required (GPMM3141)
5V or 6V selector allows use of smaller servos limited to 5V
180 day limited warranty, USA and Canada only

Includes

ElectriFly 3A BEC (battery eliminator circuit) for 2S-6S LiPo
Batteries, universal receiver connector, Deans Male Ultra input
connector and instructions

Requires

Connecting between receiver and battery following instruction sheet

Specifications

Battery Type: 2 - 6S LiPo (7.4V - 22.2V)
6 - 18C NiMH/NiCd (7.2V - 21.6V)
Max Constant Current: 3 amps
Selectable Output Voltage: 5 - 6V
Weight: 0.28oz (8g)