Foxnovo Durable Aluminum Alloy Horizontal Hang 3-Hole Transmitter Neck Strap Balancer Regulator (Blue) Color: mainly blue. Material: durable aluminum alloy. Transmitter Neck Strap Balancer Regulator. Regulator installation: Horizontal. Come with 3-holes. It is quick and easy to attach to your transmitter. Keeping balance and free your two hands.