General Specifications ● Bluetooth Version: V5.3 ● Chipset: AB5656C ● Support Profile: AVRCP/AVDTP/A2DP ● RF Carrier Frequency Range: 2402-2480GHZ ●Charging Port: Pogo Pins ●Bluetooth Decoding Mode: SBC, AAC ●Microphone Quantity: 2Mic * 2 ●Water Resistance: IP54 ●Transmission Distance: ≤10 meters / 33ft ●Pairing Name: NM-NanoBuds OP100 ●Battery Type: Lithium Polymer ●Earphone Input Voltage: 5V ●Earphone Working Voltage: 3.2V-4.2V ●Battery Capacity: 50 mAh ●Talk Time: up to 7 hours ●Music Playback Time: 7-8 hours ●Full Charging Time: 1.5 hours ●Charging Case: Li-ion battery 400mAh ●Charging Case Weight: Approx. 44 g ●Earbud Weight: 9g *2 ●Earphone Standby Time: About 100 hours ●Earbud Dimension: 44*40*11mm ●Charging Case Dimension: 88*48*20mm ●Materials: ABS+PCS, Aluminum Alloy