• Wireless earbuds in clear AS Plastic case with Silicone lid featuring convenient Aluminum carabiner attachment. • Power/Technology: Rechargeable Lithium Polymer battery: 3.7V/55 mAh; Sensitivity: 110 dB; Frequency Response: 20Hz-20000Hz; Wireless V4.2; Wireless Profile: HSP/HFP/ADP/AVRCP; Transmission Range: 10m (30 ft). • Approx. playback time: 2.5 hours for music, 1.5 hours talk time. • Features built-in microphone for answering calls. • Must be charged prior to first use. Charge time varies by device. • Earbuds feature Silicone cover for comfort during use. • Includes USB charging cable and instructions. • CE, FCC and RoHS Approved.