Model Number: HX-312-1-#3549 Key Specifications/Special Features: Feature:Transparent acoustic tube style surveillance earphone received superior sound even in noisy environment, and it’s also discreet and portableChangeable acoustic tube assembly for hygiene and multiple usersClip can secure to user’s lapel to meet their need360 degree revolving back clip can turned by different segments to secure to the user's lapel or collarPTT:

Built-in microphone

Skid-proof texture on the surface making holding more comfortable

360° revolving back clip can turn by different segments to meet user's need

Metal clip enhances the durability

Bottom of back clip is covered by the soft rubber to keep skid-proof and protect clothes

Easily hidden inside a sleeve or under clothing

Speaker:

• OD: Φ16mm
• Resistance: 90Ohm±15%
• Sound pressure level: 90dB±3dB
• Rated power: 100mW
• Max power: 20mW

Microphone:

• Type: Electret microphone
• Sensitivity: -40dB±3dB at 1000Hz
• Resistance: 2.2KOhm