KING LUCKY / I31PROBK

KING LUCKY i31PRO is a completely wireless earphone with an open ear design that does not block your ears.

■Air conduction
・Control the directionality of sound emitted from the speaker by detecting the shape of the ear canal
・Suppresses diffusion to the surroundings and efficiently transmits sound waves into the ear canal in the form of a beam

■Open year
・Uses shape memory titanium wire to freely adjust
- Made of high quality silicone material, soft to wear
・Open ear (hook type) design that naturally fits the shape of your ears based on ergonomics

■Comfort and safety
- Adopts air conduction technology and open ear design, and uses shape memory alloy wire and high quality silicone material for the ear hook part. Since it does not put pressure on the ear canal, it not only reduces the feeling of ear fatigue even after long periods of use, but also provides a comfortable fit that reduces the risk of ear problems such as otitis externa and acoustic hearing loss. The ear hooks can be adjusted freely to fit your ears securely, and are designed to not come off even during intense exercise. For people who want to comfortably listen to music in a variety of situations in their daily lives, they can use it safely and with peace of mind because they can keep track of their surroundings without covering their ears.

■High-quality music playback and calls
-Equipped with a 16.2mm dynamic driver, which is the largest among wireless earphones, it reproduces all ranges from high to deep bass with clear sound quality and well-balanced reproduction. In addition, it is equipped with a dual microphone ENC noise reduction system based on proprietary technology, which suppresses surrounding noise and accurately captures human voices, allowing clear and realistic audio to be transmitted to the other party. When playing games or watching videos, you can switch to a low-latency mode to reduce the lag between sound and video. Regarding sound leakage, which is a concern with open-ear earphones, air conduction technology that controls directionality suppresses the diffusion of sound to the surroundings and minimizes sound leakage. (Due to its structure, sound leakage cannot be completely prevented.)

■High speed and stable connection
- Adopts Bluetooth 5.3, ensuring high-speed transmission and stable connections with various Bluetooth-compatible electronic devices such as iPhone, Android, Windows, and iOS within a range of 10 meters, with almost no delays or skipping.
Pairing with the device to be connected is done only the first time, and from the second time onward, the earphones will be automatically connected just by removing them from the charging case.

■Easy operation and sweat and waterproof
・Smart operations that allow you to easily play/pause music, adjust volume, and answer/end calls by simply lightly touching the clearly placed touch area, and are also compatible with Japanese voice guidance, Siri, and Google Assistant. In addition, it is compliant with waterproof standards equivalent to IPX3*, and is durable enough to withstand normal rain and sweat during exercise.
*Body only (charging case not supported)

■Long time music playback and calls
- Up to 12 hours of music playback and up to 8 hours of talk time with the earphones alone; up to 30 hours of music playback and up to 20 hours of talk time when used with the charging case.


■Earphones
・Wearing method: Ear hook type
・Material: Shape memory alloy wire + silicon
・Model: Open ear type (air conduction)
・Wireless method: Bluetooth5.3
・Power class: Class2
・Maximum communication distance: Approximately 10m
・Frequency band used: 2.4GHz band
・Supported profiles: HFP/HSP/A2DP/AVRCP/SPP/PBAP
・Supported codec: SBC/AAC
・Playable files: MP3/WMA/APE/FLAC/AAC/MP4/M4A/WAV/AIF/AIFC
・Driver drive type: Dynamic type
・Driver diameter: φ16.2mm
・Output sound pressure level: 123.8bB±3dB
・Impedance: 16Ω
・Reproduction frequency band: 20Hz to 20kHz
・Built-in microphone type: MENS microphone
・Mic sensitivity: -38dB±3dB
・Directional characteristics: omnidirectional
・Noise canceling: ENC
・Voice assistant: SIRI/Google Assistant
・Automatic attachment detection function: Yes
・Waterproof: IPX3 equivalent
・Low delay mode: Yes
・Battery capacity: 80mAh
・Playback time: Continuous approximately 12 hours, maximum approximately 30 hours (with charging case)
・Call time: Continuous approximately 8 hours, maximum approximately 20 hours (with charging case)
・Charging time: Approximately 2 hours
・External dimensions (one side): Approx. W50 x D10 x H50mm
・Weight (one side): Approx. 10.6g

■Charging case
・Battery capacity: 400mAh
・Charging time: Approximately 2 hours
・External dimensions: Approximately W90 x D32 x H70mm
・Weight: Approx. 45g


・Charging cable (USB Type-C)
・Warranty (1 year warranty period)