Specifications: Bluetooth wireless transmission, support for hands-free calls. Support the TF card automatic playback function. Support computers, mobile phones, MP3 players and other audio interface. Type: Bluetooth Speaker Material: ABS SNR: 80 (db) Impedance: 4 () Distance: 10meters Rated Voltage: 5 (V) Rated Power: 3 (W) Bluetooth Version: 2.1 Audio Interface: 3.5mm Frequency: 2402 - 2480MHz Rated Frequency: 90Hz - 20KHz Playing Time: About 1 Hour Expand TF Card: 32GB (Not Included) Speaker Type: Portable Speaker Power Supply: DC 5V, 300mAH Built-in Li-ion Battery Features: Portable, Mini, Useful, Wireless, Bluetooth Audio Input, Bluetooth Hands-free Calls, LED Light Size: 6.1cm x 6.1cm x 6.2cm/2.40" x 2.40" x 2.44" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bluetooth Speaker 1 x 2 In 1 Audio USB Charging Cable