INSTRUCTION BOOK LACKED WORDS FOR [3 TO 4] HRS CHARGING TIME AND [3.5 HRS] AFTER-CHARGING USEAGE TIME. ALSO WORDS ARE NEEDED IN INSTRUCTION BOOK TO SAY THAT IT MUST BE CHARGED UP ENOUGH AND THE CHARGING CORD DISCONNECTED BEFORE YOU CAN SEE A LIVE IMAGE ON SCREEN. ALSO WORDS SHOULD BE MENTIONED THAT SMART PHONE IS AN OPTIONAL FEATURE AND NOT A REQUIREMENT FOR USE OF THIS DEVICE. I LOVE THE OPTIONAL TOOLS THAT ARE AVAILABLE FOR THIS DEVICE, WHICH ARE ALSO NOT MENTIONED IN MANUAL.
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