(nb) open-type in-ear wireless earphones are now fully remodeled with LDAC support! LDAC support and fully remodeled!

MTI Corporation (Location: Toshima-ku, Tokyo; President: Keijie Chang), a consumer electronics brand based on the concept of "making good things more accessible," announces the release of the "nb Audio Open+2 (Open+2)," an open-type completely wireless earphone with LDAC support, on July 4, 2025. Open+2 will be available from July 4, 2025.

Open+2 is an open-type fully wireless earphone that does not block the ear. While maintaining the basic performance of the first generation model, which was well received by customers, the new model is compatible with the high-quality Bluetooth codec "LDAC" and has enhanced the volume of low frequency range. The new model is a fully remodeled open earphone with enhanced sound quality and improved call quality.

Open2-BK Case

Features.

Open-type fully wireless earphones that do not block the ear

Soft, ultra-thin ear-hooks that minimize ear strain and interference with eyeglasses

■ Large 11 x 15mm dynamic driver with excellent bass reproduction even in an open-type earphone

Supports LDAC, a high-quality sound wireless codec

Sound tuning supervised by NUARL sound engineers

Call noise reduction for calls and voice meetings in noisy environments

Voice control of Siri/Google and other applications from the earbuds

Touch-sensitive controls for smartphone songs, volume control, and incoming calls

Supports battery level indication by blinking LEDs on the iOS device screen and charging case

Supports multipoint connections

IPX5 water resistance

Low latency "gaming mode" to reduce sound lag in games and videos

Long playback time of up to 8 hours by itself and up to 30 hours in combination with the charging case

Certified for technical compliance for use in Japan.

Product Specifications

Product name: (nb)Audio Open+2

Specification ：Open type complete wireless earphone

Driver ：11×15mm dynamic full range single

Dimensions ：(Earphone) 16.5×37.7×42.5mm

　　　　　　　　　　(Charging case) 96×46×25

Weight ：(Earphone) 6.8g

　　　　　　　　　　(Charging case) 49.4 g

Power ：Main body ：DC3.7V/55mAh

　　　　　　　　　　Charging case : DC3.7V/400mAh

Continuous playback time*1 : Approx. 8 hours (AAC) / Approx. 5 hours (LDAC)

Total playback time (max): approx. 30 hours (with charging case)

Charging time (max.): approx. 2 hours

Communication method : Bluetooth Ver5.4/Class2

Profile ：A2DP, AVRCP, HFP, HSP

Number of simultaneous connections: 2 (multipoint connection)

Supported codecs: LDAC, AAC, SBC

Microphone (one side): Omni-directional x 1 (for calls)

Accessories ：Charging case, charging cable (USB TYPE A-C),

　　　　　　　　　　Quick guide and warranty card

Color ：OPN2-BK：Black / OPN2-WH：White

JAN code ：OPN2-BK：4560358457780 / OPN2-WH：4560358457810

Warranty ：1 year

Certification ：Technical Regulations Conformity Certification (R222-252271), Electrical Appliance and Material Safety Law

1 Continuous playback and talk time may be shortened by external factors such as radio wave environment.

Sales Information

Regular price: 14,300 yen (tax included)

Release date: July 4, 2025

Planned sales destinations: Electronic appliance mass retailers, specialty stores, e-commerce malls, etc.

PRODUCT IMAGE

Open2-BK earphones

Open2 Series

＜What is nb?

(nb) is a brand of inexpensive, high-performance, cost-effective foreign-made consumer electronics products brought to you by MTI Corporation, based on the concept of "bringing good things closer to you. Products bearing the (nb) logo are sold through our company and some of our partner companies.

＜About MTI Corporation

Ltd. was established in Japan in 1998 as a trading company that provides import and export services between Japan and China. In the 2000s, the company began to develop its own products for the Japanese market based on the knowledge it had acquired. Since then, we have developed a wide variety of products to meet the demands of the domestic market. Today, in an era of ever-changing technological innovation, we are utilizing our unique manufacturing network to obtain the latest information and conduct a comprehensive OEM/ODM business from product planning, design and development, to import/export trading. We will continue to improve our management skills (Management) and technology (Technology) to deliver better products to our customers with a sense of innovation.

For customer inquiries, please contact: direct@mtijp.com