🎧 Product Specifications – Bluetooth Earphones (Jerry AC7003D8) Bluetooth Version: V5.4 Chipset: Jerry AC7003D8 Supported Protocols: Headset / Hands-Free / A2DP / AVRCP Transmission Range: 10 meters Frequency Band: 2402–2480 MHz Max RF Output Power (EDR): 4 dB Modulation Type (EDR): GFSK, π/4-DQPSK 🔊 Audio & Driver Speaker Size: 13 mm Impedance: 32 Ω ±15% Frequency Response: 20 – 20,000 Hz Sensitivity: 98 dB ±3 dB 🔋 Power & Charging Charging Voltage: DC 5V Earphone Battery Capacity: 30 mAh (each) Charging Box Capacity: 300 mAh Charging Time (Earphones): ~1 hour Charging Time (Box): ~1.5 hours Talk/Music Time: ~4 hours Standby Time: 150 hours Charging Interface: USB-C 📦 Build & Features Net Weight (with case): 57.6 g Single Earbud Weight: 3.7 g Dimensions: 60.6 × 45.2 × 21.7 mm Features: Noise reduction Transparency mode ENC call noise reduction Sliding tuning support Magnetic wireless charging Prompt sound notification