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If you already own the GSR2 and wish to upgrade to the GSR2/Temp 2X the you can do so with this upgrade kit.

The kit includes:
• Temperature sensor
• Dual-sensitivity temperatuere meter
• Thermometer
• External finger sensors for hands-free use
• Earphones that allow only you to hear the signal
• Instruction manual
• CD with a short relaxation program.

Everything needed to increase the power of the GSR2 to the GSR2/Temp 2X. If you already have a GSR2 you might want to go back to see all biofeedback accessories.