... of control distance 2.4 Control Modes 3.Easy use for Light,Motor,Fan,Gate,Door,Lock, Window, Blind, Banne, Winch, Bell ... soldering Unit size: 110mm x 50mm x 18mm Power Supply: 1 x 23A -12V battery (included, can be used for 12 months)Usage:Button 1 ... the transmitter.relay 1 ~ 4 are interlocked; relay 5 ~ 8 are interlocked; relay 9 ~ 12 are interlocked.Control mode Latched (relay 1 ...