US$ 272.50
ensure a stable 5V power supply with at least 500mA current capacity
Purchase the 4 Series 40A 18650 Lithium Battery Protection Board 14
Monitor Voltage: Use a multimeter to periodically check remaining voltage
The silicone band can be adjusted by removing the spring bars on either side of the case and repositioning the band to your wrist size
Requires appropriate thermal management
NLV32T-121J-EF Wire Wound Inductors M2M Jumper Wires (20cm) (20pcs) ensure a stable 5V powerNLV32T 121J EF Wire Wound Inductors
US$ 272.50
US$ 172.50
US$ 349.50
US$ 547.50
US$ 195.00
US$ 32.35
US$ 179.00
US$ 425.00
US$ 45.00
US$ 54.00
US$ 93.00
US$ 125.00
US$ 130.00
US$ 195.00
US$ 93.00
US$ 105.00
US$ 21.00