Required dehumidifier capacity starts at floor area in pyeong times 0.76 L for apartments. Rated extraction is measured at 27C and 60% relative humidity over 24 hours, so a unit rated at 30C and 80% drops to roughly 70% under Korean conditions.
Qi2 25W is the brand name for Qi v2.2.1, lifting the ceiling from 15W to 25W. But that number only appears when the charger, wall adapter, case and phone all line up.
A USB-C cable rated for 240W can still cap out at 480Mbps for data. Power ratings and data ratings are separate specifications carried by separate wires. Here is how to read e-marker requirements, speed tiers and length limits.
HDMI 2.1's 48Gbps shrinks to 42.6Gbps once encoding overhead is stripped out. Here is the bandwidth 4K 240Hz at 10-bit really demands, calculated line by line against every standard.
Wi-Fi 7 beats 6E through two multipliers: double the channel width and a 1.2x gain from 4K-QAM. Here is where the spec's 2.4x comes from, and why Korea's 1200MHz of 6GHz fits only three 320MHz channels.
A projector labeled 8,000 lumens measured 251 lux while a 200 ANSI-lumen model hit 477 lux. What ANSI lumens actually measure, why plain lumen ratings cannot be compared, and how many lumens each screen size needs.
The cabin limit for power banks is 160Wh, roughly 43,000mAh. Since 20 April 2026 it is two units per passenger, and in-flight charging is banned. Here is the mAh-to-Wh maths behind it.
The wattage printed on a charger is a ceiling. USB PD fixes a maximum for each voltage step, going past 100W requires a separately certified 240W cable, and a 65W three-port charger drops its main port to 35W once every socket is in use.
U3 and V30 on the same card mean the same thing — 30 MB/s minimum write, written in two different standards. A 340 Mbps 4K stream needs 42.5 MB/s. Here is the class table and the bitrate math.
The 24-month value of Korea's 25% plan discount on an 89,000-won tariff is 534,000 won. If the handset subsidy on offer beats that, take the subsidy; if not, take the discount. Plus what changed when the handset law was repealed.