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Black cordless knee wrap with adjustable straps and a front control module

ZJZK

ZJZK ST-502 4-in-1 Cordless Knee Massager 5000mAh

SKU CH-N8HQ-PFQ6Z MPN ST-502

Cordless knee wrap delivers airbag compression, vibration, heat and red light with three adjustable levels each, powered by a 5000mAh battery

  • Product nameElectric Knee Massager
  • Power typeUsb
  • Product colorBlack
  • Product type4-IN-1 CORDLESS KNEE MASSAGER
  • Key featuresUpgraded 4-in-1 Portable Knee Massager
  • Four-in-one therapy combines compression, vibration, heat and red light for joint relief
  • Three heat levels and three vibration modes allow precise comfort adjustment
  • Cordless 5000mAh battery enables portable therapy at home or while travelling
  • Adjustable wrap with skin-friendly material fits various body types for daily comfort
  • Simple indicator lights and Type-C charging make operation effortless for wellness gifting

Cordless 4-in-1 Knee Therapy

The ZJZK ST-502 combines airbag compression, vibration, heat, and red light therapy in a single wrap. A 5000mAh battery powers cordless sessions charged via USB Type-C. Three heat levels and three vibration modes adjust to personal comfort. Premium skin-friendly materials fit various leg sizes for daily joint relief.

Suits Home and Travel Recovery

This massager fits adults seeking portable relief from stiffness or fatigue without a wall outlet. The adjustable wrap secures easily for use while reading, working, or resting. Buyers who need clinical-grade prescriptive settings or hands-free operation during intense exercise should look at other devices.

5000mAh Battery Capacity

The integrated 5000mAh cell determines how long the unit runs between charges. It supports multiple full therapy cycles on a single charge for uninterrupted use away from power. Verify that this runtime matches your typical session length and frequency before purchase.

How it compares

Measured against everything we stock in Massage Guns & Electric Massagers, at today’s prices. Recalculated every night.

Price $97.99
Pricier than about 90% of the 1,533 comparable items (median $50.99).

Specifications

Product
Brand nameZJZK
Model nameST-502
Part numberST-502
Product nameElectric Knee Massager
Product colorBlack
Product type4-IN-1 CORDLESS
KNEE MASSAGER
Power
Power typeUsb

Questions about this item

How do I choose between the three heat levels and three vibration modes on the ST-502?

Use the control panel to cycle through three heat levels and three vibration modes independently, combining them with airbag compression and red light for a 4-in-1 session tailored to your comfort.

What does the 5000mAh battery actually deliver during a typical session?

The 5000mAh rechargeable battery powers cordless operation for multiple therapy sessions at home or while travelling before needing a Type-C recharge.

How does USB Type-C charging limit the way I can power the massager?

Type-C charging means you can replenish the 5000mAh battery from any standard USB-C source such as a wall adapter, power bank or laptop port.

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