JHT (also marketed as JHT Sound or JHT Sound Works) is the consumer brand of J & H Technology Co., Ltd., a Shenzhen, China-based manufacturer founded in 2004 that develops electronic musical instrument accessories. The company focuses on tuning and pedalboard utility products, including digital tuners, metronomes, metro-tuners, power supplies for effects, and small headphone amp plugs.

The brand is best known for its compact strobe tuners and miniature pedalboard accessories. Notable products include the Nano Tune (NTS-1) pedal tuner, the Strobe Square (SCT-1) clip-on strobe tuner, the JH-5000S strobe metro tuner, and the Power Supply Nano (PSN-1), a compact pedalboard supply with switchable polarity outputs. Their tuners offer a fast meter mode alongside a higher-resolution strobe mode advertised at around 0.1 cent accuracy.

JHT showcased products at trade events such as Musikmesse Frankfurt and distributes through online retailers including Amazon, eBay, and Reverb rather than through a heavy artist-endorsement model.

JHT has 2 products cataloged on Equipboard, including Effects Pedal Accessories and Pedal Tuners.