1Stable: This BT speaker supports a transmission distance of about 10m/32.8ft (varies due to environmental factors, equipment, etc), and the connection is stable. 2Stereo: The wireless speaker has built in noise reduction function, 360 three dimensional surround sound, giving you an immersive feeling, improve music experience. 3Long Battery Life: BT speaker has built in high quality 1800mAh polymer battery, about 4 hours charging time, 10 hours working time, 200 hours standby time. 4Flashlight Function: Equipped with a flashlight function, it can be used as a temporary flashlight in case of emergency, with a hook for easy portability. 5Waterproof: Waterproof protection against rain, dust, snow, perfect for showering, hiking, camping without worrying about weather and outdoor conditions. Item Type: BT Speaker Material: ABS Speaker Output: 2 x 3W Frequency: 280Hz-16KHz Signal to Noise Ratio: 95dB Distortion: 0.5% Charging Voltage: 5V0.5V Charging Time: 4 Hours Working Hours: 10 Hours Standby Time: 200 Hours Built in Polymer Lithium Battery: 1800mAh 1 xBT Speaker 1 x Hanging Buckle 1 x Manual 1 x Charging Cable