This is the Transmitter Neck Strap from Tactic.
Will work with any 2-stick airplane transmitter with a neck strap hook.

Features

Metal spring-loaded clasp
Tactic 2.4GHz and SLT logo on strap
Adjustable

Includes

One Tactic transmitter neck strap

Requires

Attaching clasp to hook on transmitter

Specifications

Length of strap: 16" (406.4mm)