The Motorola PMLN8341 surveillance kit has 1-wire and upgraded audio tubing for use in loud environments. Motorola PMLN8341 Features 1 wire with integrated earpiece and PTT button IMPRES technology 1- Year Motorola warranty Compatible radios Motorola R7 PMLN8341 Specifications Weight (lb) 0.15 Accessory Type Earpiece Number wires 1 Programmable Button No Intrinsically Safe TIA4950 - UL Certified Bluetooth Capable No Volume Control No IMPRES Audio Yes Windporting No Manufacturer Motorola Solutions Color Black Warranty 1-Year