1. Dual-mode listening, covering a wider range of users Supports both sound pickup amplification mode and line-in amplification mode, allowing for flexible switching based on different usage scenarios.
Sound pickup amplification mode: Enhances ambient sound, suitable for people requiring hearing assistance and those with mild hearing loss;

Line-in mode: Provides stable sound amplification through wired connection, covering people with hearing impairment ranging from mild to moderate hearing loss.
2. Bone conduction amplification for more comfortable long-term wear Utilizes bone conduction technology to transmit sound to the auditory system through bone vibration, avoiding the direct stimulation of the ear canal and eardrum caused by traditional in-ear acoustic amplification.
More comfortable for long-term wear in lectures, meetings, and guided tours, helping to reduce ear canal discomfort and auditory fatigue.
Achieves a stable gain of 25–35dB in line-in mode, with distortion less than 0.5%, effectively improving voice clarity and intelligibility, ensuring that lectures, presentations, and meeting content are heard clearly and for extended periods.
Ear-hook bone conduction structure, non-in-ear design, lightweight (approximately 32g), no pressure even with prolonged use, suitable for classrooms, meetings, guided tours, and business communication.

5. Strong compatibility, easy connection to presentation systemsUses a 3.5mm audio interface, which can be connected to the receiver of the presentation system via a Type-C to 3.5mm audio cable, compatible with many RETEKESS presentation system products (except the TT126 series), facilitating systematic deployment and use.
6. Stable battery life, meeting all-day usage needsBuilt-in 200mAh lithium battery, approximately 6 hours of battery life, Type-C charging interface, fully charged in about 2.5 hours, meeting the continuous use needs of daily lectures, meetings, and guided tours.
1. Dual-mode listening, covering a wider range of users Supports both sound pickup amplification mode and line-in amplification mode, allowing for flexible switching based on different usage scenarios.
Sound pickup amplification mode: Enhances ambient sound, suitable for people requiring hearing assistance and those with mild hearing loss;

Line-in mode: Provides stable sound amplification through wired connection, covering people with hearing impairment ranging from mild to moderate hearing loss.
2. Bone conduction amplification for more comfortable long-term wear Utilizes bone conduction technology to transmit sound to the auditory system through bone vibration, avoiding the direct stimulation of the ear canal and eardrum caused by traditional in-ear acoustic amplification.
More comfortable for long-term wear in lectures, meetings, and guided tours, helping to reduce ear canal discomfort and auditory fatigue.
Achieves a stable gain of 25–35dB in line-in mode, with distortion less than 0.5%, effectively improving voice clarity and intelligibility, ensuring that lectures, presentations, and meeting content are heard clearly and for extended periods.
Ear-hook bone conduction structure, non-in-ear design, lightweight (approximately 32g), no pressure even with prolonged use, suitable for classrooms, meetings, guided tours, and business communication.

5. Strong compatibility, easy connection to presentation systemsUses a 3.5mm audio interface, which can be connected to the receiver of the presentation system via a Type-C to 3.5mm audio cable, compatible with many RETEKESS presentation system products (except the TT126 series), facilitating systematic deployment and use.
6. Stable battery life, meeting all-day usage needsBuilt-in 200mAh lithium battery, approximately 6 hours of battery life, Type-C charging interface, fully charged in about 2.5 hours, meeting the continuous use needs of daily lectures, meetings, and guided tours.
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Material |
ABS Plastic |
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Host Dimensions |
113*113*47.5mm |
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Host Weight |
Approximately 32g |
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Power Supply Method |
Built-in lithium-ion battery 601230, 3.7V~200mAh |
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Battery Life |
Approximately 6 hours of operation |
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Charging Method |
Type-C port/5V1A charging |
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Charging Time |
Approximately 2.5 hours for a full charge |
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Speaker Specifications |
Diameter 14mm/8Ω/0.5W speaker |
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Distortion |
<0.5% distortion |
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Gain Range |
25~35dB noise level |
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Operating Temperature |
-10℃~50℃ operating temperature |
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Audio Interface |
Type-C interface |
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Ambient Sound Pickup Range |
Approximately 1.5m cable length |
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TT042 Bone conduction receiving earphone |
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title |
quantity |
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TT042 Bone conduction receiving earphone |
1 |
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Product Manual |
1 |
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USB to Type-C Charging Cable |
1 |
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Type-C to 3.5 mm Audio Cable |
1 |
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Packaging Box |
1 |
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