JOYROOM JR-OE4 Open-Ear True Open Free Wireless Headphones-Black Series Joyroom Openfree OE4 Model: JR-OE4 BT version: BT5.4 Audio encoding/decoding format: AAC, SBC BT range: 10m Water resistance: IPX4 Music time (50% volume): 12.5h Music time (50% volume) with charging case: 50h Battery capacity: 80mAh (headphones)/800mAh (charging case) Charging time: about 3h Charging input: 5V⎓1A Charging port: Type-C Frequency response range: 20Hz-20KHz Max output power: 20mW Speaker impedance: 16Ω Speaker size: Ф16mm Overall size: 88.7*66.5*32mm Material: ABS+PC Net weight: about 78.8g (single headphone: about 10g) Key Specifications: Design: Open-ear, true open-free design for comfortable, safe situational awareness during workouts. Connectivity: Bluetooth 5.4 with a 10-meter range; supports AAC and SBC codecs. Battery & Playtime: Up to 12.5 hours of music playback (at 50% volume) on a single charge, expanding up to 50 hours total using the 800mAh charging case. Earbud battery capacity is 80mAh each. Charging: USB Type-C port (5V⎓1A input) taking about 2 to 3 hours for a full charge. Audio Performance: 16mm dynamic drivers with a 16Ω impedance and 20Hz–20KHz frequency response range. Durability: IPX4 water resistance (sweatproof). Build & Weight: Made of ABS + PC materials with a total net weight of roughly 78.8g (about 10g per single earbud.
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