Description: 5.0 enable your car: transform your vehicle's Cassette deck into a Audio receiver so you can stream your favorite songs through your car's speakers with dual channel stereo support Stream for hours: 8 hours of continuous streaming from a single charge with the built-in rechargeable lithium-ion battery (USB charging cable included) Sleep : the receiver will auto turn off within 5 minutes after disconnected from any device Keep your old devices alive: add receiving functionality to your old boom boxes and Walkman's with a cassette deck Plug and play: no driver or software needed Specification: Material: ABS Colour: Black Product size: Approx.10x6.4x0.9cm / 3.9x2.5x0.35 inch answer/call: support Audio format: AAC, MP3, SBC, Stereo support: 5.0 + EDR Indicator light: blue, red Transfer distance: Approx.10m Battery capacity: 140mAh Charging current: 80mA Pairing current: 8mA, standby current: 2mA, playing music, dialing current is 30mA Working voltage: 3.3-4.2V Charging input voltage :4.5V-5.3V Output method: Note: Built-in lithium battery charging IC, charging current 200Ma Package Includes: 1x Cassette Adapter 1x USB cable 1 x user manual