| 摘要 |
<p>A communication system for rock climbing and other activities is provided. The communication system comprises a first communication device having a first front surface. A first faceplate is mounted on the first front surface of the first communication device with the first faceplate preferably having three columns. A plurality of depressible status command buttons are mounted on the first front surface of the first communication device outside the first faceplate. A plurality of depressible action command buttons are mounted on the first front surface of the first communication device outside the first faceplate. A depressible variable command button is mounted on the first front surface of the first communication device outside the first faceplate. A depressible confirmation button is mounted on the first front surface of the communication device outside the columns.</p> |
