speed set button
速度设定按钮
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Parents can program a third button with up to 20 other speed-dial options, and set the device to only accept calls from those numbers.
FORBES: Mobiles For Minors
应用推荐
模块上移
模块下移
不移动