Complete Package & Key Specifications
The COMFIER Neck Massager (Model: ST-304) includes: massager, 1200mAh rechargeable lithium battery, Type-C power jack, user manual. Dimensions: 5.75 x 6.5 x 2.2 inches, weight: 11.68 oz. The device operates at 5W, with a pulse width of 20-400μs and an adjustable heat function between 38℃-48℃.

3 Stimulation Modes
The ST-304 TENS device offers 3 modes, with 2 stimulation options and 15 intensity levels for each mode. It delivers electrical pulses via neck electrode pads, providing relaxation and comfort to the back of the neck.

Heating Function
The heating feature has one mode and maintains a constant temperature of 32℃ to 38℃ for a warming sensation. The stimulation and heating functions can be used independently or together, offering a customizable experience.

Adjustable Controls
The neck electrode pads offer stimulation and heat to soothe the muscles. The main unit allows users to adjust intensity, switch stimulation modes, and control the ON/OFF and heating functions for maximum convenience.

User-Friendly Buttons
The device features simple push-button controls for easy operation. Four buttons allow users to switch the device on/off, change modes, adjust heating, and increase or decrease intensity levels, ensuring a personalized experience.

Comfort & Relaxation
Designed to help relax muscles in the back of the neck, the device is ideal for those experiencing muscle tension from everyday activities or physical strain, offering temporary relief and soothing warmth.

