Specifications:<br />Mini wireless buletooth stereo earbuds render an amazing listening experience with the latest TWS (True Wireless) Bluetooth technology.<br />True Wireless Bluetooth｣ｬ Portable Stereo Mini Headphones｣ｬ Sports Headsets Lightweight Earbuds With Mic for iPhone Samsung HTC LG and other Bluetooth devices<br />Dimensions:<br />Earbud: 0.55 (D) x 0.82 (L) (14x21mm)<br />Portable charging case: 3.58 (D) x 1.61  x 0.93(H) (L) (91x41x23.5mm)<br />Weight:<br />Earbud: 0.18 oz (5.2g)<br />Portable charging case: 2.93 oz (83g)<br />Battery type: Rechargeable lithium-ion polymer battery<br />Battery input:<br />Earbud: 5V / 35mA<br />Portable charging case: 5V / 1A<br />Battery Output:<br />To earbuds: 5V / 200mA<br />USB Output: 5V / 1A<br />Battery capacity:<br />Earbud: 55mAh<br />Portable charging case: 2100mAh<br />Charging time:<br />Earbud:  90 minutes<br />Portable charging case:  150 minutes<br />Standby time (power on): about 27 hours<br />Standby time (power off): about 120 days<br />Music playback time: up to 2 hours<br />Talk time: up to 3 hours<br />Frequency response: 20Hz-20kHz<br />Bluetooth version: 4.1<br />Bluetooth profiles: HFP｣ｬ HSP｣ｬ AVRCP｣ｬ A2DP and SPP<br />Audio enhancements: Noise reduction and echo cancellation<br />Package includes:<br />2 Bluetooth Earbuds<br />1 Dual-Function Portable Charger<br />1 USB Charging Cable<br />3 Ear Tips: Small｣ｬ Medium｣ｬ Large<br />1 User Manual