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Turn any outlet into a charging station and offer your users with a compact, flexible power option with the LA-421 single-port USB charger. Ideal for personal use or for small venues, the charger’s compact design makes it easy to carry and store, and ensures that it will not block access to other outlets when in use. The charger supports input voltages of 100-240 VAC at 50-60Hz.


One (1) LA-421 1-Port USB Charger
One (1) LA-422 USB to Micro USB Cable


  • Compatible with all Listen Technologies iDSP products
  • Ideal for personal use or in smaller spaces/venues
  • Compact design will not block access to other outlets when in use
  • Easy to store and carry
Configurations & Architectural Specs


LA-421-01 1-Port USB Charger (North America)

Architectural Specs

LA-421-01 1-Port USB Charger shall provide charging of a Listen Intelligent portable product for use in North America. The device shall have an input voltage of 100-240VAC and an output of 5.0VDC, 1000 mA.  The LA-421-01 is specified.

Product Specifications
Specification LA-421


Power Supply Input 100-240 V, 50-60 Hz, 0.18 A
Power Supply Output 5.0 VDC, 1000 mA


Color Black
Shipping Weight 1.0 lbs. (454 g)
Cable Length 36 in. (92 cm)
Cable Type USB to Micro USB Cable, (LA-422)
Dimensions (H x W x D) 1.25 in. x 1.25 in. x 1.25 in. (32 mm x 32 mm x 32 mm)
Unit Weight 2.20 oz. (62 g)


Standards ETL, UL, CE, FCC, RoHS
Used With
Q What is Listen Technologies product warranty?
A Click for Listen's product warranty.
Q What is the purpose of the LA-421?
A The LA-421 is used to charge Listen Intelligent portable products.
Q Can you charge other USB type devices with the LA-421?
A Yes, but it is highly recommended to check with the manufacturer of the other device for specification compatibility.
Q Can I use the product outside of North America?
A Yes, but you will need an international plug adapter.
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