Model of Earbuds: JR-DB2 Name of pairing: Joyroom Jdots DB2 In-ear Color: black, purple, and creamy white Bluetooth JL-AD6973D4 chip BT audio decoding: AAC, SBC BT version: V5.3 Protocols supported include HSP, HFP, A2DP, and AVRCP. Frequency of operation: 2402-2480 KHz The earbuds have a 35mAh battery. Capacity of the case battery: 500mAh 16Ω is the speaker impedance. Rated power: 2 * 3 mW 6mm speaker 7 hours of music at 70% volume Playtime total: 42 hours at 70% volume Call duration: 5 hours, volume: 70% About 48 hours is the earbuds' standby time when connected. Charging input for earbuds: 5V to 200mA Input for case charging: 5V, 1A Type-C charging input port Number of cycles: roughly five Charging time for earbuds: 1.5 hours; charging time for case: 1.5 hours IP54 water resistance Composition: ABS+PC Weight of earphones: 3g Net weight: 36g