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electric module, voltage module, buck boost converter, drok voltage regulator, voltage converter, power converter, voltage transformer, voltmeter, ammeter, voltage ampere meter, current meter, digital multimeter, USB meter, digital audio amplifier, amplifier module, diy ammplifier, stereo amplifier, stereo speaker, motor speed control, PWM controller, electric test kit, electric test helper
DROK has been specializing in electronic modules for many years. We have an independent research team and quality testing team, our aim is to offer qualified product to every customers. Our products includes voltage regulator, digital panel meter, USB tester meter, audio amplifier module, PWM speed control, speakers and etc. Customizing products as customer's need are welcomed sincerely.