电源开关位于后盖一起交流入口，所有其他的旋钮和插孔都在前线。
The mains switch is located on the rear cover along with the ac inlet, all the other knobs and jacks are on the front.
但如果条件许可，仍建议开关柜后盖板到墙之间以及开关柜两侧到墙之间均留出适当的通道以便安装维修。
But if conditions permit, we still suggest that to leave appropriate channels on both back and side for installation and maintenance.
照明装置至少包括带内螺纹的金属衬套、印刷电路板、发光二极管、微动开关、弹簧电极、电池及金属后盖。
The lighting device comprises at least a metal sleeve with a female thread, a printed circuit board, a LED, a microswitch, a spring electrode, a battery and a rear metal cover.
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