1、Double folding design, compact and small, easy to carry and convenient to use. 2、TWS interconnection, free switch between single and dual ear, meeting your needs. 3、Bluetooth 0, ultra low power design, bringing great using experience. 4、Continuous playback time of more than 6 hours, 360 hours super long standby time. 5、Equipped with reflective stickers for increased safety at night, more confident to use. 1 x Bluetooth Earphone1 x User Manual1 x Charging Cable1 x Pair of Earplugs1 x Storage Bag Item Type Earphone Waterproof IP55 Main Chip RTL8763B Working Frequency 100-20KHz (depend on the speaker, the range of the PCB board is 20Hz-20KHz, but the speaker can not reach this range) Transmit Power Class2 Maximum Output Power 1W Rated Output Power 0.8W Bluetooth Distance Approx. 15m/ 49.2ft Bluetooth Antenna 2.4GHz 8010 Chip Antenna: RFANT8010080A3T Touch Button No Physical Button 3 (on/off button / volume +/-) Bluetooth Protocol A2DP/HFP, HSPAVRCP, GAVDP, AVDTP Bluetooth Version BT V 5.0 MIC Anti-interference microphones, -38±3dB Speaker 1w dual speaker Battery Type Rechargeable polymer lithium battery with capacity of 160mAh Operating Voltage 3.2V- 4.2V Charging Voltage 4.75V- 5.25V Standby Time 360 hours Play Time More than 6 hours Material Silicone Gross Weight Approx. 254g Package Size Approx. 17x7x6cm/ 6.7x 2.8x 2.4in