Item Type: Wireless Church Guide Material: ABS Frequency Range: 2403-2483MHz Maximum Transmission Distance: Approx, 200m/656.2ft Number of Channels: 50 Battery Type: Lithium Battery Battery Model: 523450 Transmitter Battery Capacity: 1500mAh(included) Receiver Battery Capacity: 1000mA (included) Working Time of Transmitter Side: 12H Receiver Side Working Time: 20H Package List 1 x Transmitter 1 x Receiver 1 x Charging Cable 1 x Headset Mark 1 x Earbuds 1HiFi Sound Quality: The HiFi wireless church guide uses IC noise reduction technology to effectively reduce noise for clearer and more fidelity listening 2LCD Display: This wireless church guide uses LCD display to show the volume, working channel and other information, and supports sound input. 3Professional Technology: This LCD wireless church guide uses DPLL digital frequency control technology, preset multiple channels can be selected for use. 4Intelligent Chip Encryption: 50 channels, no fear of crosstalk, no fear of sound leakage, support the use of multiple teams in the same place at the same time, no interference with each other. 5200m Transmission: UHF high frequency transmission technology, to ensure that the sound is clear and stable. High energy lithium battery, ultra long life span, worry free explanation.