1. Transparent acoustic tube style surveillance earphone received superior sound even in noisy environment, and it’s also discreet and portable. 2. Changeable acoustic tube assembly for hygiene and multiple users 3. Clip can secure to user’s lapel to meet their need 4. All units feature heavy grade industrial jacketed cables and excellent strain relief for maximum life in the field. (Surveillance PTT) 1. Internal microphone element with excellent voice pick up 2. 360 degree revolving back clip can turned by different segments to secure to the user's lapel or collar 3. Metal clip enhances the durability 4. Reinforced strain relief gives unit maximum durability 5. Can be easily concealed under a sport coat, jacket or other clothing specification: