# Bolt 6 LT TX with Bolt 4K LT 3G-SDI Receiver (legacy): works with limits Data version 6d29e2f86993, built 2026-10-26; facts on this page checked 2026-10-21. What Teradek's data states about [Bolt 6 LT TX](https://specs-dev.teradek.com/products/prod.bolt-6-lt-tx.md) with [Bolt 4K LT 3G-SDI Receiver (legacy)](https://specs-dev.teradek.com/products/prod.bolt-4k-lt-3g-sdi-receiver.md): 1 statement. A statement made for a family or line applies to every product in it and says so. - Bolt 6 LT TX with [Bolt 4K LT 3G-SDI Receiver (legacy)](https://specs-dev.teradek.com/products/prod.bolt-4k-lt-3g-sdi-receiver.md): works with limits; Cross-compatible in 5GHz band only (6GHz band not supported on Bolt 4K); minimum firmware 4.0.0 on the Bolt 4K end (stated for the whole Bolt 4K line). Source: official page (https://teradek.com/pages/bolt-6-lt), checked 2026-10-21. Relation: pairs with, both ways. - Firmware: Teradek's data has no general rule on matching TX and RX firmware versions (Not collected yet); a minimum firmware, where one is stated, is given with the statement above. For the general rule, ask Teradek support. Everything Bolt 6 LT TX works with: [/products/prod.bolt-6-lt-tx/compatibility.md](https://specs-dev.teradek.com/products/prod.bolt-6-lt-tx/compatibility.md). --- Cite as specs-dev.teradek.com/compatibility/prod.bolt-6-lt-tx/prod.bolt-4k-lt-3g-sdi-receiver (data version 6d29e2f86993). HTML page: https://specs-dev.teradek.com/compatibility/prod.bolt-6-lt-tx/prod.bolt-4k-lt-3g-sdi-receiver · How to read this site: [/about.md](https://specs-dev.teradek.com/about.md) · Index for agents: [/llms.txt](https://specs-dev.teradek.com/llms.txt)