This earpiece requires the use of a radio connection kit. Two styles are available. The 1-wire kit (G1W) includes an in-line mini push-to-talk (PTT) microphone. The 2-wire kit also includes a mini push-to-talk microphone except it is on a separate wire. This allows for flexibility in placement of the PTT. Both kits are made of rugged Kevlar™ reinforced cable for extra durability.