Listen to your favorite music on your car stereo Easy to read digital display Convenient control options Last FM frequency memory function Built-in soft light designed to minimize distractions while driving Hands-free calling for safer driving experience 300 mAh rechargeable battery supports up to 10 hours of playback Effective range: 15 ft Frequency range: 88.1–107.9 MHz Power supply: 300 mAh internal lithium battery via Micro-USB cable Operating time: up to 10 hours with built-in battery Charging input: 5 V DC Color: black Material: ABS + PC Size: 62 x 25 x 14 mm Package Contents: 1 x FM Transmitter Only the items listed are included; other items are not part of the package Note: Lighting and display settings may cause slight color variations between the image and the actual item Measurement error allowance: ±1–3 cm