Features: Made of ABS and rubber matterial, durable and practical, suitable for all kinds of outdoor activities. Both sides of the headset have a sound receiver Microphone. Talkback Mic picks up clear voice. The headset adopts NATO standard plug to connect with PTT (PTT is not included). The earmuffs are made of high-quality sponge pad, ensuring long time wearing comfort and noise isolation. The ventilation holes on the earmuffs can release air inside to provide users with comfort. Note 1: This product needs to use with PTT (not included). Note 2: 2 * AAA batteries are needed, please buy two yourself.