Roku Express 4K (3940R) ships as compact set-top puck with separate HDMI 2.0b cable and Micro-USB 5V/1A power. HDMI output port uses provided short cable—no built-in connector. 4K HDR10+/HLG support (no Dolby Vision) with Wi-Fi 5 dual-band and Bluetooth for remote control.
Budget 4K player with HDMI 2.0b output, Micro-USB power. Wi-Fi 5, no Dolby Vision support.
Device Information
- Manufacturer
- Roku
- Release Year
- 2021
- Model Number
- 3940R
- Category
- Streaming Device
Available Ports
| Connector | Quantity | Label | Notes |
|---|---|---|---|
| HDMI 2.0b (Type A – Standard) | 1 | HDMI Output | Female port, includes short cable, 4K 60Hz with HDR10+/HLG |
| USB Micro-B (USB 2.0) | 1 | Power Input | 5V/1A, 5W |
Notes & Compatibility
Set-top puck format. Includes short HDMI cable in box. Female HDMI port, not built-in male.
Common questions
How many ports does the Roku Express 4K (2021) have?
The Roku Express 4K (2021) has 2 ports in total: 1 × HDMI 2.0b (Type A – Standard) and 1 × USB Micro-B (USB 2.0).
What kinds of ports does the Roku Express 4K (2021) have?
By connector family, the Roku Express 4K (2021) has 1 HDMI and 1 USB.
How many USB ports does the Roku Express 4K (2021) have?
The Roku Express 4K (2021) has 1 USB port: 1 × USB Micro-B (USB 2.0).
What video connections does the Roku Express 4K (2021) have?
The Roku Express 4K (2021) has 1 port that can carry video: 1 × HDMI 2.0b (Type A – Standard).
How is the Roku Express 4K (2021) powered?
The Roku Express 4K (2021) takes power over 1 × USB Micro-B (USB 2.0), rated for up to 5 W.
Does the Roku Express 4K (2021) have a USB-A port?
No. The Roku Express 4K (2021) has no full-size USB Type-A port. It has 1 × USB Micro-B (USB 2.0) instead, so full-size USB accessories need an adapter or a hub.
Does the Roku Express 4K (2021) have a headphone jack?
No. The Roku Express 4K (2021) has no 3.5 mm headphone jack. Its audio connections are 1 × HDMI 2.0b (Type A – Standard).
