Introduction
This manual provides essential instructions for the safe and effective use of your Kircuit 12V AC Adapter. This adapter is designed to convert standard AC power into the DC power required by compatible devices, such as Sony TMR-RF995R, TMR-RF985R, MDR-RF995R, MDR-RF985R, and AC-MS1202C headphone systems. Please read this manual thoroughly before use and retain it for future reference.
Safety Information
- Ensure the adapter's input voltage (100-240V AC) matches your local power supply.
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Avoid using the adapter if the cable or plug is damaged.
- Do not attempt to open or repair the adapter. Refer servicing to qualified personnel.
- Keep the adapter away from children and pets.
- Unplug the adapter from the power outlet when not in use for extended periods.
Package Contents
- 1 x Kircuit 12V AC Adapter
Setup Instructions
- Unpack the Adapter: Carefully remove the Kircuit 12V AC Adapter from its packaging. Inspect it for any visible damage.
- Identify the Device Port: Locate the power input port on your compatible Sony headphone system (e.g., TMR-RF995R transmitter). This port typically accepts a barrel plug connector.
- Connect to Device: Insert the barrel plug connector of the Kircuit AC adapter firmly into the power input port of your Sony device. Ensure a secure connection.
- Connect to Power Outlet: Plug the AC prongs of the adapter into a standard 100-240V AC electrical wall outlet.

Figure 1: Kircuit 12V AC Adapter with its power cord and barrel plug connector. This image shows the main unit and the attached cable, ready for connection.

Figure 2: The Kircuit 12V AC Adapter plugged into a power strip on a desk, demonstrating a typical setup environment. The adapter is compact and fits well alongside other plugs.
Operating Instructions
Once the Kircuit 12V AC Adapter is properly connected to both your Sony headphone system and a power outlet, it will begin supplying the necessary power. The adapter is designed for continuous operation to power your device or charge its internal battery, if applicable.
- The adapter provides a stable 12V DC output to your device.
- No user interaction is required for the adapter's operation once connected.
- Refer to your Sony headphone system's manual for specific operational details regarding power indicators or charging status.
Maintenance
- Cleaning: Disconnect the adapter from both the power outlet and your device before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: When not in use, store the adapter in a cool, dry place, away from direct sunlight and moisture. Avoid tightly winding the cable to prevent damage.
- Cable Care: Do not bend, twist, or pull the cable excessively. Avoid placing heavy objects on the cable.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on/charging. |
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| Adapter feels warm during use. |
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Specifications
| Brand | Kircuit |
| Input Voltage | 100-240V AC, 50/60Hz, 0.3A |
| Output Voltage | 12V DC |
| Connector Type | Barrel Plug |
| Compatible Devices | Sony TMR-RF995R, TMR-RF985R, MDR-RF995R, MDR-RF985R, MDR-RF995RK, MDR-RF985RK, MDRRF985RK/BJ, MDRRF985RK/C Headphone Systems, AC-MS1202C |
| Power Source | Corded Electric |
| Special Features | Built-in Dynamic IC, Charger IC & Power fuse for rapid charging and overcharge protection. |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |

Figure 3: Close-up of the Kircuit 12V AC Adapter's label, displaying input (100-240V AC) and output (12V) specifications. The image also highlights the approximate 6.5 ft cord length.
Warranty and Support
For warranty information or technical support, please contact the seller or manufacturer directly. Retain your proof of purchase for any warranty claims.
- Brand: Kircuit
- Manufacturer: Shenzhen Waweis Technology Co., Ltd