package list:<br />1 x rotation led electronic clock kit (included cr 1220 lithium cell)<br /><br />specification:<br />model: ssy-sz04<br />pcb size: 81mm x 81mm x 1.6mm/3.189x3.189x0.063"<br />material: fr4 military level<br />pcb color: black<br />digital tube display: blue｣ｬgreen｣ｬred<br />power supply voltage: usb｣ｬ external connection 5v ｣ｬ3v button battery for clock chip on the board of the standby power supply<br /><br />function:<br />1. electronic clock function. four digital tube display time function. every second｣ｬ digital tube｣ｬ two points on a flashing｣ｬ at the same time｣ｬ the casing outside the clock led will take turns to light up a take turns bright finish a circle represents the clock through a minute<br />2. date display. through the key switch｣ｬ you can see the preset date. <br />3. alarm function. through the button switch｣ｬ you can set the alarm clock function. when to set the alarm time｣ｬ buzzer sounds｣ｬ if not｣ｬ manually turn off the buzzer will continue to ring for 10 minutes. specific look at the following keys function description<br />4. burning function. the reserved buffer program interface｣ｬ can change to the circuit board to do procedure｣ｬ easy to operate<br />5. real time clock function. tone after a preset time｣ｬ even if the power lost｣ｬ again after power on｣ｬ no need to set a time<br />6. temperature display function. under the time display mode｣ｬ press plus｣ｬ can display the current temperature<br />7. light control function｣ｬ according to the environment automatically adjust the brightness (also can be used as a night light);<br /><br />key function:<br />plus key｣ｬ for years｣ｬ months｣ｬ s｣ｬ hours｣ｬ minutes｣ｬ seconds add operation. according to the numerical sum 1 at a time<br />mode key｣ｬ can be in display clock｣ｬ switch to the year｣ｬ month｣ｬ ｣ｬ hours｣ｬ minutes｣ｬ alarm clock｣ｬ the adjustment of outer ring led display state. to use add key to the year｣ｬ month｣ｬ ｣ｬ hours｣ｬ minutes｣ｬ seconds｣ｬ and display mode to adjust<br />rst key｣ｬ press the reset button｣ｬ then the mcu reset