1、Acoustic tube secret service covert listen only earpiece headset. 2、The discreet acoustic tube ear piece fits snugly in the ear and allows the user to hear in high noise environments and keeps incoming communication private. 3、Receive only (no transmit) 2.5mm plug (standard headphone jack) with acoustic tube with metal clip. 4、It can rotate 360 degrees, is light, flexible and comfortable to wear. 5、In-ear design, to avoid water leakage, with noise reduction function, can effectively isolate external noise, so that the signal is not affected. Features: 1. Acoustic tube secret service covert listen only earpiece headset. 2. The discreet acoustic tube ear piece fits snugly in the ear and allows the user to hear in high noise environments and keeps incoming communication private. 4. It can rotate 360 degrees, is light, flexible and comfortable to wear. 5. In-ear design, to avoid water leakage, with noise reduction function, can effectively isolate external noise, so that the signal is not affected. Specification: Condition: 100% Brand New Material: ABS Interface Size: Approx. 2.6 x 2.2 x 0.2cm / 1.0 x 0.9 x 0.1inch Weright: Approx. 30g Package List: 1 x Air Tube 1 x Connecting Cable 1 x Earbud Cover