Accsoon’s CineView Master 4K II launch draws scrutiny under Chinese intelligence law

Accsoon, headquartered in Shenzhen, China, sells the CineView Master 4K II transmitter-and-receiver kit at $899, $50 above the original model’s $849 launch price, and B&H Photo had it listed for preorder as of Oct. 28, 2026 with no confirmed U.S. ship date.

The CineView Master 4K II sends native DCI 4K — the 4096 × 2160 cinema frame — and UHD at 3840 × 2160, each at up to 60 frames per second. RTMS 4.0, Accsoon’s wireless transmission protocol, debuted on the original model in November 2024 and remains unchanged in the Mark II. The protocol runs together on 2.4 GHz, 5 GHz, and 6 GHz in both units.

Accsoon claims sub-35-millisecond latency for 4K60 and sub-25-millisecond latency for 1080p60 at low bitrate, excluding camera delay. Accsoon rates the range at 2.5 km or 1.55 miles for 1080p60 in clear line-of-sight without interference. As many as 10 devices can monitor at the same time.

Independent tests of the original model differ. Matthew Allard ACS of Newsshooter clocked real-world 4K60 latency at 77.66 milliseconds while testing the original model in November 2024, roughly 2.2 times the company’s claimed sub-35-millisecond result. A review from Explore & Renovate in February 2026 put 4K latency between 27 and 33 milliseconds on the original model, conflicting with the Newsshooter result.

Without antennas, the transmitter weighs 322 grams and the receiver 320 grams. Both run on NP-F batteries (a common camera battery format) or DC power ranging from 7.4 to 16.8 volts. On the transmitter, HDMI 2.0 input joins a loop output and 3G-SDI input, plus USB-C video output; the receiver matches with HDMI 2.0 output, 3G-SDI output, and USB-C video output new on that unit.

Accsoon lists Sony and Canon models as supported control cameras. The Mark II works with older CineView Master 4K, Master 4K Lite, SE 4K, M7 Pro, and M7H Pro units. Frame.io Camera to Cloud pushes H.265 proxy files to Adobe servers through a mobile workflow linked to the transmitter’s USB-C port.

An update to the SEE iOS app around IBC 2025 gives free monitoring and camera control with no subscription and no Accsoon hardware, on iOS 18.0 or later. A September 2025 firmware update added full H.265 encoding and as many as 10 device connections to the original CineView Master 4K. Camera control came to the CineView SE 4K in February 2026 at $499, with the CineView M7 Pro receiving it later through a firmware update.

Tech Times identifies Accsoon as Shenzhen Accsoon Technology Co., Ltd., based in Shenzhen, Guangdong Province, China. It says Article 7 of China’s 2017 National Intelligence Law requires organizations and citizens to back, assist, and cooperate with national intelligence work, applying to Accsoon no matter where products are sold, servers sit, or privacy policies promise. The report also cites the 2017 Cybersecurity Law on technical help for security and intelligence agencies, and the 2021 Data Security Law on government access to data it considers important.

For normal wireless monitoring, the transmitter and receiver work as a local radio-frequency link without sending pictures or sound to Accsoon’s servers or the internet. Under its privacy policy, the Accsoon SEE app can gather device identifiers, usage patterns, and network information, and Accsoon’s servers distribute firmware updates. Tech Times reports that researchers have not released an independent security assessment of Accsoon’s wireless video gear.

Tech Times reports that Accsoon appears in no U.S. government advisory, no FCC covered-list listing, and no export control measure as of Oct. 31, 2026. Accsoon is not covered by the same U.S. government bans that apply to Hikvision or Dahua. Tech Times says the exposure traces to Chinese law rather than a known security incident, and that its disclosure does not tell buyers to avoid the product.

Hollyland Technology, which makes the Pyro Ultra, is based in Shenzhen too and answers to Chinese state law. The Pyro Ultra sells for $1,199 and relies on dual-band 2.4 and 5 GHz with no 6 GHz, and Tech Times research finds no independent real-world benchmark for the Pyro Ultra. Accsoon’s guidance calls for an isolated radio-frequency setting, review of SEE app permissions, limits on automatic firmware updates during secure productions, and a security officer on the production for sensitive content.