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7.83HZ Schumann Wave Generator Schumann Resonance Pulse Generator with USB Audio Resonator Low Frequency Pulse for Helps Sleep
$13.91-14.49
Min. order 5 pieces
Schumann Waves Resonance Generator 7.83Hz Ultralow Frequency Pulse Audio Resonator With Acrylic Case 0.01~100KHz Adjustable
$15.40-15.94
Min. order 2 pieces
7.83hz Schumann Resonance Ultra-Low Frequency Pulse Wave Generator Audio Resonator With Box for Electrical Tool
$6.34-7.79
Min. order 5 pieces
7.83Hz Schumann Resonances Generator Ultra-Low Frequency Stable Pulse Chip Wave Pulse Generator for Home and Office Use
$2.67-2.90
Min. order 10 pieces
relay module
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module board
relay module
1/2/4/8 Channel ESP32 WIFI BT-compatible BLE Relay Module AC90-250V/DC5-30V Power Supply ESP32-WROOM Development Board
$6.50-13
Min. Order: 10 pieces
20 sold
20DO 2DI 2AI RS485 Modbus RTU Relay Multifunction Module PLC IO Expanding Board 4-20MA 0-10V Current and voltage acquisition
$22-23
Min. Order: 5 pieces
Relay Switch Controller DC 6~80V Voltage Detection Charging Discharge Monitor with Case Digital display DC voltage detection
$7.30-7.50
Min. Order: 10 pieces
AC 110V 220V DC 12/24V Digital Time Relay LED Display Timer Control Switch Timing Time Switch TS4586
$3.50-4.50
Min. Order: 20 pieces
DC 12V Dual LED Display Time Relay Module T2401-N Digital Time Delay Relay Cycle Timer Switch Control Module Passive Output
$2.10-2.50
Min. Order: 20 pieces
10A 1 channel Delay time relay module 5V 12V 24V timing programmable optical coupler isolation pulse cycle power off trigger
$2-3
Min. Order: 10 pieces
ESP8266 WIFI 1/2/4 CH Channel 30A Relay Module DC 12V 24V ESP-12F Development Board DC 7V-28V 5V For Smart Home Wireless Control
$4-9
Min. Order: 10 pieces
1 sold
12ch Digital Input Output UART RS485 Relay Module Modbus RTU DIN35 C45 Rail Box for PLC PTZ LED Motor Machine control
$22-23
Min. Order: 10 pieces
5V 12V 24V 1/2/4/8 Channel Relay Module High and low Level Trigger Dual Optocoupler Isolation Relay Module
$0.50-5
Min. Order: 10 pieces
55 sold
1pcs H3Y-2 AC 220V Delay Timer Time Relay 0 - 30 Minute/Seconds with Base
$2-2.50
Min. Order: 10 pieces
AC-DC 12V2A 24V1A Switching Power Supply Module Bare Circuit AC100-265V to DC12V2A DC24V1A Board
$2.20-2.25
Min. Order: 20 pieces
DC 9V 12V 24V 36V 48V 72V 84V 120V to 5V 12V 3A Step Down Module Power Supply DC DC Converter Non-isolated Buck Converter
$1.70-1.80
Min. Order: 20 pieces
AC-DC 5V 700mA 12V 450mA 5W Precision Buck Converter AC 220V to 5V DC Step Down Transformer Power Supply Module
$0.80-1
Min. Order: 20 pieces
AC-DC 12V 1.5A 5V 2A 9V 2A Switching Power Supply Module Bare Circuit 100-265V to 12V 5V 9V Board
$1.10-1.15
Min. Order: 20 pieces
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Timer DC 5V 12V 24V 36V Cycle Delay High Level Trigger Module Programmable Digital Switch Board Dual MOS Pulser Optocoupler
$1-1.50
Min. Order: 20 pieces
DC 5V 12V 24V Infinite Cycle Delay Timing Time Relay Timer Control ON-OFF Loop Switch Module Double Adjustable 0-100 Mminutes
$1.50-2
Min. Order: 20 pieces