Specifications: Bluetooth version: v3.0+EDR, Class 2 Audio profile: A2DP Transmission Distance: up to 10m Operation time: up to 8 hours Frequency: 2.4GHz Hands-free call: Support Audio output: 3.5mm stereo Jack Dimension: 55mm(L) x 25mm(W) x 10mm(D) (Approx.) Weight: 1.23oz(35g) Color: Black Package Included: 1 x Car Bluetooth Music Receiver with Hands-free 1 x Micro USB Power Cable 1 x 3.5mm Audio Jack 1 x User Manual