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3Pcs HM-11 bluetooth 4.0 BLE Serial Module Board SMD 2.4 GHz

3pcs ISD1820 3-5V Voice Module Recording And Playback Module Control Loop / Jog / Single Play Geekcreit for Arduino - products that work with official Arduino boards

3Pcs KEYES HM-10 6-Pin Transparent BLE bluetooth V4.0 Serial Port Module With Logic Level Translator

3Pcs Keypad OLED Shield Blue Backlight For Robot LCD 1602 Board

3pcs KM-1 DC 6-12V PWM Motor Speed Controller Kit DIY Motor Speed Regulator Set Sealed Potentiometer Stepless Speed Control Long Service Life Stable Performance Small Noise And Large Torque Function

3Pcs KY-008 Laser Transmitter Module For AVR PIC