1.Chip:NRF51822 2.Broadcast Interval:1000ms 3.Communication distance: within 50m 4.Button battery model: CR2032 5.Battery capacity:240mAh Broadcast power: -95dB - 4dB (adjustable 1-9 gears) Product features: IP65 waterproof, dustproof (splash-proof, , not soaking) Applications: Wearables Mobile Beacons Rezence wireless charging monitoring PC peripherals Proximity/Alert sensors Consumer Electronics (CE) remote controls Smart Home Sports, fitness and healthcare sensors smart tags Intelligent domestic appliances Industrial and commercial sensors major minor Toys and electronic games size: 30 x 30 x 10mm Material: plastic colour: White Package Contents: 2 x NRF51822 Bluetooth module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.