C20 Smart Watch Manual

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C20 New Sports Smartwatch BT Smart Bracelet IP67 Waterproof 0.96inch

C20 smartwatch smart ip67 bracelet wristband detachable 96inch waterproof bt rate heart sports screen

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NHT-PRO C20 AMPLIFIER SCH Service Manual download, schematics, eeprom

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C20 New Sports Smartwatch BT Smart Bracelet IP67 Waterproof 0.96inch