Charging time: 3-5hours Power supply: built-in 3.7V / 1000mAh lithium battery 1x Bluetooth speakers Bluetooth Version: 4.1 + EDR 1x USB cable Frequency: 40 HZ-18 KHZ Charge: 5 v / 600 mah Supports 3.5mm external audio input terminals of all. Features: Bluetooth connection, wired connection Time of play: about 8 hours Compatible with all Bluetooth devices such as smartphones, tablets, iPODs . Reception distance: 10 m and less Supported formats: (max 32GB) Stereo audio transmission protocol (A2DP V1.2) 1x Audio cable Output Power: 108405mm 4Ω; 3 W Supports playback of MP3 songs stored in the Product Name: Wireless Bluetooth Speaker Bluetooth chip, clear sound and quality, powerful bass and can enjoy unhindered stereo music anytime, anywhere when you're out. Outdoor Bluetooth speaker, bluetooth wireless transmission 4.1 + integrated EDR, working distance up to 10 . Supports rechargeable. Super deep bass subwoofer speakers with high quality, 360 3D surround sound and -control. Packing size: 85mm x 30mm Handsfree support when answering calls (with microphone) Signal to noise ratio: ≥ 95dB Product color: gold, silver Roommate Speakers Computer Gaming Speakers with Headphone